GOO SLOP

AGENTS.md

@@ -0,0 +1,17 @@
+# Slimepire Project — Agent Rules
+
+## Before editing ANY file: ALWAYS re-read it first
+
+I often edit code manually while the agent is running. If you edit a file based on
+stale content from a previous read, you will overwrite my manual changes.
+
+**Rule:** Before calling `edit` or `write` on any existing file, read it again with
+`read` to get the current state. Never rely on file contents from earlier turns or
+from a previous compaction/context window.
+
+## Code style
+
+- Godot 4.7 C# project targeting .NET 10.0
+- Uses `GodotSharp.SourceGenerators` — provides `[Singleton]`, `[SceneTree]`,
+  `[ResourceTree]`, and `Instantiator.Instantiate<T>()`
+- Keep things simple, avoid over-engineering

Slimepire.csproj

@@ -9,4 +9,7 @@
   <ItemGroup>
     <PackageReference Include="GodotSharp.SourceGenerators" Version="2.7.0" />
   </ItemGroup>
+  <ItemGroup>
+    <Folder Include="src\Gameplay\Nodules\BasicNodule\" />
+  </ItemGroup>
 </Project>

Slimepire.csproj.DotSettings

@@ -0,0 +1,2 @@
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+	<s:Boolean x:Key="/Default/CodeInspection/NamespaceProvider/NamespaceFoldersToSkip/=src_005Cgameplay_005Ccomponents_005Cenergy/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>

Slimepire.sln.DotSettings.user

@@ -1,5 +1,6 @@
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+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003ARect2_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002Econfig_003FJetBrains_003FRider2026_002E1_003Fresharper_002Dhost_003FDecompilerCache_003Fdecompiler_003F20fdbba659cf4839ac49151c015340545a7800_003F6a_003F71fa77df_003FRect2_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
 	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003ASceneTreeAttribute_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003FAppData_003FRoaming_003FJetBrains_003FRider2026_002E1_003Fresharper_002Dhost_003FDecompilerCache_003Fdecompiler_003Fe3fd2c31500d4d359fd6e9d5ca458884e0400_003F2f_003Faabb8bdb_003FSceneTreeAttribute_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
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assets/gradient_linear.png.import

@@ -0,0 +1,40 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://b2y7oc421yoyd"
+path="res://.godot/imported/gradient_linear.png-f1664a719d29c2fd7ef75dfe3ee8f4a4.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://assets/gradient_linear.png"
+dest_files=["res://.godot/imported/gradient_linear.png-f1664a719d29c2fd7ef75dfe3ee8f4a4.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

assets/metaball.png.import

@@ -0,0 +1,41 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://byk86jmfv7p64"
+path.s3tc="res://.godot/imported/metaball.png-a6b8702ab5ec503295d5f109cf071bd1.s3tc.ctex"
+metadata={
+"imported_formats": ["s3tc_bptc"],
+"vram_texture": true
+}
+
+[deps]
+
+source_file="res://assets/metaball.png"
+dest_files=["res://.godot/imported/metaball.png-a6b8702ab5ec503295d5f109cf071bd1.s3tc.ctex"]
+
+[params]
+
+compress/mode=2
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=true
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=0

assets/root_nodule.png.import

@@ -0,0 +1,40 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://tomd3kojw0qy"
+path="res://.godot/imported/root_nodule.png-981ed6f2ff13b8d32aab753225ea9d2d.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://assets/root_nodule.png"
+dest_files=["res://.godot/imported/root_nodule.png-981ed6f2ff13b8d32aab753225ea9d2d.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

assets/shaders/metaball.gdshader

@@ -0,0 +1,37 @@
+shader_type canvas_item;
+
+varying vec2 quad_uv;
+
+uniform vec2 ball_0;
+uniform vec2 ball_1;
+uniform vec2 ball_2;
+uniform vec2 rect_size = vec2(1920, 1080);
+uniform float ball_radius = 12.0;
+uniform float cam_zoom = 1.0;
+uniform vec2 cam_pos = vec2(0.0);
+uniform float threshold : hint_range(0.0, 1.0) = 0.5;
+uniform vec4 color : source_color = vec4(0.3, 0.5, 0.2, 1.0);
+uniform sampler2D noise_tex : repeat_enable;
+
+void vertex() {
+    quad_uv = UV;
+}
+
+float field(vec2 pos) {
+    return (ball_radius * cam_zoom) / max(length(quad_uv * rect_size - pos), 1.0);
+}
+
+void fragment() {
+    float sum = field(ball_0) + field(ball_1) + field(ball_2);
+    float a = smoothstep(threshold - 0.05, threshold, sum);
+
+    vec2 screen_px = quad_uv * rect_size;
+    vec2 world_px = (screen_px - rect_size * 0.5) / cam_zoom + cam_pos;
+    float n1 = texture(noise_tex, world_px * 0.0005).r;
+    float n2 = texture(noise_tex, world_px * 0.0008 + 0.33).r;
+    float hue_shift = (n1 - 0.5) * 0.12;
+    float value_shift = (n2 - 0.5) * 0.15;
+    vec3 shifted = color.rgb + vec3(hue_shift * 0.5, hue_shift, -hue_shift * 0.5) + value_shift;
+
+    COLOR = vec4(shifted, a * color.a);
+}

assets/shaders/metaball.gdshader.uid

@@ -0,0 +1 @@
+uid://8xu2s3gyxp0v

global.json

@@ -1,7 +1,7 @@
 {
   "sdk": {
-    "version": "9.0.0",
-    "rollForward": "latestMajor",
-    "allowPrerelease": true
+	"version": "9.0.0",
+	"rollForward": "latestMajor",
+	"allowPrerelease": true
   }
 }

project.godot

@@ -21,8 +21,8 @@ buses/default_bus_layout="uid://djkq0k3jsuxcg"
 
 [display]
 
-window/size/viewport_width=480
-window/size/viewport_height=320
+window/size/viewport_width=1920
+window/size/viewport_height=1080
 window/stretch/mode="canvas_items"
 window/stretch/aspect="expand"
 

src/Core/EnergyManager.cs

@@ -1,44 +0,0 @@
-using Godot;
-using Slimepire.Gameplay.Nodules.Components;
-
-namespace Slimepire.Core;
-
-[Singleton]
-public partial class EnergyManager
-{
-    private List<EnergyProducer> _energyProducers = [];
-    private List<EnergyStorage> _energyStorages = [];
-
-    public void RegisterEnergyProducer(EnergyProducer energyProducer)
-    {
-        _energyProducers.Add(energyProducer);
-    }
-
-    public void RemoveEnergyProducer(EnergyProducer energyProducer)
-    {
-        _energyProducers.Remove(energyProducer);
-    }
-
-    public void RegisterEnergyStorage(EnergyStorage energyStorage)
-    {
-        _energyStorages.Add(energyStorage);
-    }
-
-    public void RemoveEnergyStorage(EnergyStorage energyStorage)
-    {
-        _energyStorages.Remove(energyStorage);
-    }
-
-    public void TransferEnergy(float energy)
-    {
-        foreach (var energyStorage in _energyStorages)
-        {
-            if (energyStorage.Energy + energy <= energyStorage.MaxEnergy)
-            {
-                energyStorage.AcceptEnergy(energy);
-            }
-        }
-    }
-
-    public void RequestEnergy(float energy) { }
-}

src/Core/EnergyManager.cs.uid

@@ -1 +0,0 @@
-uid://boaiqjlh7qq3o

src/Core/GameResources.cs

@@ -2,5 +2,5 @@ using Godot;
 
 namespace Slimepire.Core;
 
-[ResourceTree("/src/Data")]
+[ResourceTree("/src")]
 public static partial class GameResources;

src/Data/EnergyStorageNodule.tres

@@ -1,43 +0,0 @@
-[gd_resource type="Resource" script_class="NoduleResource" format=3 uid="uid://0d8vif4ejtp1"]
-
-[ext_resource type="Texture2D" uid="uid://ds1idectpqbnh" path="res://assets/energy_storage_nodule.png" id="1_237jx"]
-[ext_resource type="PackedScene" uid="uid://by6iw05ovnhq8" path="res://src/Gameplay/Nodules/Components/EnergyStorage.tscn" id="1_dusyu"]
-[ext_resource type="Script" uid="uid://bnf6qmk64i2wj" path="res://src/Data/NoduleResource.cs" id="2_dusyu"]
-
-[sub_resource type="AtlasTexture" id="AtlasTexture_dusyu"]
-atlas = ExtResource("1_237jx")
-region = Rect2(0, 0, 32, 32)
-
-[sub_resource type="AtlasTexture" id="AtlasTexture_rmsh8"]
-atlas = ExtResource("1_237jx")
-region = Rect2(32, 0, 32, 32)
-
-[sub_resource type="AtlasTexture" id="AtlasTexture_lmxtc"]
-atlas = ExtResource("1_237jx")
-region = Rect2(64, 0, 32, 32)
-
-[sub_resource type="SpriteFrames" id="SpriteFrames_j6wbi"]
-animations = [{
-"frames": [{
-"duration": 1.0,
-"texture": SubResource("AtlasTexture_dusyu")
-}, {
-"duration": 1.0,
-"texture": SubResource("AtlasTexture_rmsh8")
-}, {
-"duration": 1.0,
-"texture": SubResource("AtlasTexture_lmxtc")
-}],
-"loop": 1,
-"name": &"default",
-"speed": 5.0
-}]
-
-[resource]
-script = ExtResource("2_dusyu")
-SpriteFrames = SubResource("SpriteFrames_j6wbi")
-Color = Color(0.60033447, 0.5019659, 0.0981792, 1)
-NoduleName = "Energy Nodule"
-MaxEnergy = 100.0
-Components = Array[PackedScene]([ExtResource("1_dusyu")])
-metadata/_custom_type_script = "uid://bnf6qmk64i2wj"

src/Data/NoduleResource.cs

@@ -1,16 +0,0 @@
-using Godot;
-
-namespace Slimepire.Data;
-
-[GlobalClass]
-public partial class NoduleResource : Resource
-{
-    [Export]
-    public SpriteFrames SpriteFrames;
-
-    [Export]
-    public Color Color;
-
-    [Export]
-    public string NoduleName = "Nodule";
-}

src/Data/NoduleResource.cs.uid

@@ -1 +0,0 @@
-uid://bnf6qmk64i2wj

src/Data/SimpleNodule.tres

@@ -1,41 +0,0 @@
-[gd_resource type="Resource" script_class="NoduleResource" format=3 uid="uid://5gk0giodp6g"]
-
-[ext_resource type="Texture2D" uid="uid://cecg47efx7gw8" path="res://assets/simple_nodule.png" id="1_j6wbi"]
-[ext_resource type="Script" uid="uid://bnf6qmk64i2wj" path="res://src/Data/NoduleResource.cs" id="1_otepm"]
-
-[sub_resource type="AtlasTexture" id="AtlasTexture_j6wbi"]
-atlas = ExtResource("1_j6wbi")
-region = Rect2(0, 0, 32, 32)
-
-[sub_resource type="AtlasTexture" id="AtlasTexture_q8pab"]
-atlas = ExtResource("1_j6wbi")
-region = Rect2(64, 0, 32, 32)
-
-[sub_resource type="AtlasTexture" id="AtlasTexture_dh8qd"]
-atlas = ExtResource("1_j6wbi")
-region = Rect2(32, 0, 32, 32)
-
-[sub_resource type="SpriteFrames" id="SpriteFrames_x44k2"]
-animations = [{
-"frames": [{
-"duration": 1.0,
-"texture": SubResource("AtlasTexture_j6wbi")
-}, {
-"duration": 1.0,
-"texture": SubResource("AtlasTexture_q8pab")
-}, {
-"duration": 1.0,
-"texture": SubResource("AtlasTexture_dh8qd")
-}],
-"loop": 1,
-"name": &"default",
-"speed": 3.0
-}]
-
-[resource]
-script = ExtResource("1_otepm")
-SpriteFrames = SubResource("SpriteFrames_x44k2")
-Color = Color(0.2642648, 0.46582836, 0.36528692, 1)
-NoduleName = "Simple Nodule"
-NoduleType = 1
-metadata/_custom_type_script = "uid://bnf6qmk64i2wj"

src/Gameplay/BuildGhost.cs

@@ -1,13 +1,16 @@
 using Godot;
+using Slimepire.Gameplay.Components;
 using Slimepire.Gameplay.Nodules;
-using Slimepire.Gameplay.Nodules.Components;
 
 namespace Slimepire.Gameplay;
 
 [SceneTree]
 public partial class BuildGhost : Node2D
 {
-    private Tube? _tube;
+    private static readonly PackedScene NoduleScene = GD.Load<PackedScene>(
+        "res://src/Gameplay/Nodules/BasicNodule/BasicNodule.tscn"
+    );
+
     private readonly Dictionary<Nodule, Tube> _connectedTubes = [];
 
     [Export]
@@ -15,31 +18,37 @@ public partial class BuildGhost : Node2D
 
     public override void _Ready()
     {
-        _tubeConnectionArea.ConnectionAdded += ConnectionAdded;
-        _tubeConnectionArea.ConnectionRemoved += ConnectionRemoved;
+        _tubeConnectionArea.AreaEntered += OnAreaEntered;
+        _tubeConnectionArea.AreaExited += OnAreaExited;
     }
 
-    private void ConnectionAdded(Nodule nodule)
+    private void OnAreaEntered(Area2D area)
     {
-        CreateGhostTube(nodule, nodule.GlobalPosition);
-        ConnectTubePlayer.Play();
+        if (area.GetParent() is Nodule nodule)
+        {
+            CreateGhostTube(nodule, nodule.GlobalPosition);
+            ConnectTubePlayer.Play();
+        }
     }
 
-    private void ConnectionRemoved(Nodule nodule)
+    private void OnAreaExited(Area2D area)
     {
-        var tube = _connectedTubes.GetValueOrDefault(nodule);
-        if (tube == null)
-            return;
+        if (area.GetParent() is Nodule nodule)
+        {
+            var tube = _connectedTubes.GetValueOrDefault(nodule);
+            if (tube == null)
+                return;
 
-        _connectedTubes.Remove(nodule);
-        tube.QueueFree();
-        DisconnectTubePlayer.Play();
+            _connectedTubes.Remove(nodule);
+            tube.QueueFree();
+            DisconnectTubePlayer.Play();
+        }
     }
 
     private void CreateGhostTube(Nodule connectedNodule, Vector2 pos)
     {
         var tube = Instantiator.Instantiate<Tube>();
-        tube.Position = pos / 2; // TODO WHYYY????
+        tube.Position = pos;
         _connectedTubes.Add(connectedNodule, tube);
         GetParent()?.AddChild(tube);
     }
@@ -76,15 +85,12 @@ public partial class BuildGhost : Node2D
 
             if (@event is InputEventMouseButton { Pressed: false, ButtonIndex: MouseButton.Left })
             {
-                var nodule = Instantiator.Instantiate<Nodule>();
-
+                var nodule = NoduleScene.Instantiate<Nodule>();
                 nodule.Position = Position;
-                // nodule.NoduleResource = GD.Load<NoduleResource>(
-                //     GameResources.SimpleNoduleTres.ResourcePath
-                // );
-
+                nodule.EnergyBuildCost = 5f; // TODO: make configurable per nodule type
+                nodule.ConstructionProgress = 0;
                 GetParent()?.AddChild(nodule);
-
+                NoduleManager.Instance.RequestConstruction(nodule);
                 CleanupBuildMode();
             }
         }

src/Gameplay/BuildGhost.tscn

@@ -2,7 +2,7 @@
 
 [ext_resource type="Script" uid="uid://ck5yw760bu8sb" path="res://src/Gameplay/BuildGhost.cs" id="1_ahcoi"]
 [ext_resource type="Texture2D" uid="uid://cecg47efx7gw8" path="res://assets/simple_nodule.png" id="2_uo42j"]
-[ext_resource type="PackedScene" uid="uid://bjesfu1mfx8l5" path="res://src/Gameplay/Nodules/Components/TubeConnectionArea.tscn" id="2_vecmk"]
+[ext_resource type="PackedScene" uid="uid://bjesfu1mfx8l5" path="res://src/Gameplay/Components/TubeConnectionArea.tscn" id="2_vecmk"]
 [ext_resource type="AudioStream" uid="uid://mj8wvuwfc6o7" path="res://assets/sfx/tube_disconnect.wav" id="3_nxaxp"]
 [ext_resource type="AudioStream" uid="uid://bxxi7grsubvgm" path="res://assets/sfx/tube_connect.wav" id="3_quiac"]
 

src/Gameplay/Components/Energy/EnergyPackage.cs

@@ -0,0 +1,49 @@
+using Godot;
+
+namespace Slimepire.Gameplay.Components;
+
+[SceneTree]
+public partial class EnergyPackage : Node2D
+{
+    [Export]
+    public float TravelSpeed { get; set; } = 200f;
+
+    private Vector2[] _waypoints = [];
+    private int _currentWaypointIndex;
+
+    public event Action? Arrived;
+
+    public void SetWaypoints(Vector2[] waypoints)
+    {
+        _waypoints = waypoints;
+        if (_waypoints.Length > 0)
+        {
+            GlobalPosition = _waypoints[0];
+        }
+    }
+
+    public override void _Process(double delta)
+    {
+        if (_waypoints.Length == 0 || _currentWaypointIndex >= _waypoints.Length - 1)
+        {
+            Arrived?.Invoke();
+            QueueFree();
+            return;
+        }
+
+        var target = _waypoints[_currentWaypointIndex + 1];
+        var direction = target - GlobalPosition;
+        var distance = direction.Length();
+        var step = TravelSpeed * (float)delta;
+
+        if (step >= distance)
+        {
+            GlobalPosition = target;
+            _currentWaypointIndex++;
+        }
+        else
+        {
+            GlobalPosition += direction.Normalized() * step;
+        }
+    }
+}

src/Gameplay/Components/Energy/EnergyPackage.cs.uid

@@ -0,0 +1 @@
+uid://nk5tjlmcrpn2

src/Gameplay/Components/Energy/EnergyPackage.tscn

@@ -0,0 +1,29 @@
+[gd_scene format=3 uid="uid://dwdbqktsl34sm"]
+
+[ext_resource type="Script" uid="uid://nk5tjlmcrpn2" path="res://src/Gameplay/Components/Energy/EnergyPackage.cs" id="1_kmtmh"]
+[ext_resource type="Texture2D" uid="uid://bjl6gqj0bvhhp" path="res://assets/energy_package.png" id="2_psum7"]
+
+[sub_resource type="Curve" id="Curve_psum7"]
+_data = [Vector2(0, 1), 0.0, 0.0, 0, 0, Vector2(1e-05, 1), 0.0, 0.0, 0, 0, Vector2(1, 0), 0.0, 0.0, 0, 0]
+point_count = 3
+
+[sub_resource type="CurveTexture" id="CurveTexture_psum7"]
+curve = SubResource("Curve_psum7")
+
+[sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_psum7"]
+particle_flag_disable_z = true
+inherit_velocity_ratio = 0.625
+gravity = Vector3(0, 10, 0)
+scale_curve = SubResource("CurveTexture_psum7")
+
+[node name="EnergyPackage" type="Node2D" unique_id=869544034]
+z_index = 2
+script = ExtResource("1_kmtmh")
+
+[node name="GPUParticles2D" type="GPUParticles2D" parent="." unique_id=388560926]
+modulate = Color(1, 0.7764706, 0, 1)
+texture = ExtResource("2_psum7")
+lifetime = 0.3
+use_fixed_seed = true
+seed = 874795105
+process_material = SubResource("ParticleProcessMaterial_psum7")

src/Gameplay/Components/Energy/EnergyProducer.cs

@@ -0,0 +1,17 @@
+using Godot;
+
+namespace Slimepire.Gameplay.Components;
+
+public partial class EnergyProducer : Node
+{
+    [Export]
+    public EnergyStorage EnergyStorage = null!;
+
+    [Export]
+    public float ProductionRate = 1;
+
+    public override void _Process(double delta)
+    {
+        EnergyStorage.Energy += ProductionRate * (float)delta;
+    }
+}

src/Gameplay/Components/Energy/EnergyProducer.tscn

@@ -1,6 +1,6 @@
 [gd_scene format=3 uid="uid://t0gdf172f65v"]
 
-[ext_resource type="Script" uid="uid://bku1vey63ew65" path="res://src/Gameplay/Nodules/Components/EnergyProducer.cs" id="1_4q7h4"]
+[ext_resource type="Script" uid="uid://bku1vey63ew65" path="res://src/Gameplay/Components/Energy/EnergyProducer.cs" id="1_4q7h4"]
 
 [node name="EnergyProducer" type="Node" unique_id=1184182162]
 script = ExtResource("1_4q7h4")

src/Gameplay/Components/Energy/EnergyStorage.cs

@@ -0,0 +1,49 @@
+using Godot;
+
+namespace Slimepire.Gameplay.Components;
+
+[GlobalClass]
+public partial class EnergyStorage : Node
+{
+    [Export]
+    public Label EnergyLabel = null!;
+
+    [Export]
+    public float MaxEnergy = 100;
+
+    public float Energy
+    {
+        get;
+        set
+        {
+            field = Mathf.Clamp(field + value, 0, MaxEnergy);
+            UpdateLabel();
+        }
+    }
+
+    public bool TryConsume(float amount)
+    {
+        if (Energy >= amount)
+        {
+            Energy = -amount;
+            return true;
+        }
+
+        return false;
+    }
+
+    public override void _Ready()
+    {
+        UpdateLabel();
+    }
+
+    public override void _ExitTree()
+    {
+        // EnergyManager.Instance.RemoveEnergyStorage(this);
+    }
+
+    private void UpdateLabel()
+    {
+        EnergyLabel.Text = $"{Energy:0}/{MaxEnergy}";
+    }
+}

src/Gameplay/Components/Energy/EnergyStorage.tscn

@@ -1,6 +1,6 @@
 [gd_scene format=3 uid="uid://by6iw05ovnhq8"]
 
-[ext_resource type="Script" uid="uid://dgkeo1wsicv13" path="res://src/Gameplay/Nodules/Components/EnergyStorage.cs" id="1_vetx7"]
+[ext_resource type="Script" uid="uid://dgkeo1wsicv13" path="res://src/Gameplay/Components/Energy/EnergyStorage.cs" id="1_vetx7"]
 
 [node name="EnergyStorage" type="Node" unique_id=1765924301]
 script = ExtResource("1_vetx7")

src/Gameplay/Components/GrowArea.cs

@@ -1,7 +1,6 @@
 using Godot;
-using Slimepire.Core;
 
-namespace Slimepire.Gameplay.Nodules.Components;
+namespace Slimepire.Gameplay.Components;
 
 [SceneTree]
 public partial class GrowArea : Area2D

src/Gameplay/Components/GrowArea.tscn

@@ -0,0 +1,7 @@
+[gd_scene format=3 uid="uid://3x5pqm4t5cbl"]
+
+[ext_resource type="Script" uid="uid://cfxb8wmnt7ej7" path="res://src/Gameplay/Components/GrowArea.cs" id="1_a3tcn"]
+
+[node name="GrowArea" type="Area2D" unique_id=979341496]
+monitorable = false
+script = ExtResource("1_a3tcn")

src/Gameplay/Components/TubeConnectionArea.cs

@@ -0,0 +1,8 @@
+using Godot;
+
+namespace Slimepire.Gameplay.Components;
+
+[GlobalClass]
+public partial class TubeConnectionArea : Area2D
+{
+}

src/Gameplay/Components/TubeConnectionArea.tscn

@@ -1,6 +1,6 @@
 [gd_scene format=3 uid="uid://bjesfu1mfx8l5"]
 
-[ext_resource type="Script" uid="uid://bcw8vylpb533h" path="res://src/Gameplay/Nodules/Components/TubeConnectionArea.cs" id="1_uhdst"]
+[ext_resource type="Script" uid="uid://bcw8vylpb533h" path="res://src/Gameplay/Components/TubeConnectionArea.cs" id="1_uhdst"]
 
 [sub_resource type="CircleShape2D" id="CircleShape2D_x44k2"]
 radius = 96.38

src/Gameplay/GooSubViewPort.cs

@@ -0,0 +1,65 @@
+using Godot;
+using Slimepire.Levels;
+
+public partial class GooSubViewPort : Node
+{
+    private readonly Vector2[] _worldPositions =
+    [
+        new(400, 300),
+        new(430, 310),
+        new(380, 330),
+    ];
+
+    private ShaderMaterial _material = null!;
+    private ColorRect _colorRect = null!;
+    private DemoLevel _level = null!;
+
+    public override void _Ready()
+    {
+        _level = GetParent<DemoLevel>();
+        var canvasLayer = _level.GetNode<CanvasLayer>("CanvasLayer");
+        _colorRect = canvasLayer.GetNode<ColorRect>("ColorRect");
+
+        _material = new ShaderMaterial
+        {
+            Shader = GD.Load<Shader>("res://assets/shaders/metaball.gdshader"),
+        };
+        _material.SetShaderParameter("threshold", 0.5f);
+        _material.SetShaderParameter("color", new Color(0.3f, 0.5f, 0.2f, 1f));
+        _material.SetShaderParameter("ball_radius", 12f);
+        _material.SetShaderParameter("rect_size", GetViewport().GetVisibleRect().Size);
+        _material.SetShaderParameter("cam_zoom", 1f);
+        _material.SetShaderParameter("noise_tex", GenerateNoiseTexture(32));
+        _colorRect.Material = _material;
+    }
+
+    public override void _Process(double delta)
+    {
+        var cam = _level.Camera;
+        var viewSize = GetViewport().GetVisibleRect().Size;
+
+        _material.SetShaderParameter("cam_zoom", cam.Zoom.X);
+        _material.SetShaderParameter("cam_pos", cam.GlobalPosition);
+        _material.SetShaderParameter("rect_size", GetViewport().GetVisibleRect().Size);
+
+        for (var i = 0; i < _worldPositions.Length && i < 3; i++)
+        {
+            var screenPos = (_worldPositions[i] - cam.GlobalPosition) * cam.Zoom.X + viewSize / 2;
+            _material.SetShaderParameter($"ball_{i}", screenPos);
+        }
+    }
+
+    private static ImageTexture GenerateNoiseTexture(int size)
+    {
+        var img = Image.CreateEmpty(size, size, false, Image.Format.Rgba8);
+        var rng = new Random(42);
+        for (var y = 0; y < size; y++)
+        for (var x = 0; x < size; x++)
+        {
+            var v = (float)rng.NextDouble();
+            img.SetPixel(x, y, new Color(v, v, v, 1));
+        }
+
+        return ImageTexture.CreateFromImage(img);
+    }
+}

src/Gameplay/GooSubViewPort.cs.uid

@@ -0,0 +1 @@
+uid://bft481hoodv5d

src/Gameplay/GooSubViewPort.tscn

@@ -0,0 +1,6 @@
+[gd_scene format=3 uid="uid://ce2frpb21ct5l"]
+
+[ext_resource type="Script" uid="uid://bft481hoodv5d" path="res://src/Gameplay/GooSubViewPort.cs" id="1_xo53p"]
+
+[node name="GooSubViewPort" type="Node" unique_id=348721885]
+script = ExtResource("1_xo53p")

src/Gameplay/Metaball.cs

@@ -0,0 +1,11 @@
+using System;
+using Godot;
+
+public partial class Metaball : Control
+{
+    // Called when the node enters the scene tree for the first time.
+    public override void _Ready() { }
+
+    // Called every frame. 'delta' is the elapsed time since the previous frame.
+    public override void _Process(double delta) { }
+}

src/Gameplay/Metaball.cs.uid

@@ -0,0 +1 @@
+uid://cpj1q44qfwsps

src/Gameplay/NoduleManager.cs

@@ -1,4 +1,5 @@
-using Godot;
+using Godot;
+using Slimepire.Gameplay.Components;
 using Slimepire.Gameplay.Nodules;
 
 namespace Slimepire.Gameplay;
@@ -6,19 +7,29 @@ namespace Slimepire.Gameplay;
 [Singleton]
 public partial class NoduleManager
 {
+    private const float PackageSendInterval = 0.3f;
+    private const float ConstructionRetryInterval = 2f;
+
     public bool Building { get; set; }
 
     private AStar2D _aStar = new();
-    private readonly List<Nodule> _nodules = [];
+    private readonly Dictionary<long, Nodule> _nodules = [];
     private readonly HashSet<NoduleConnection> _connections = [];
+    private readonly List<RootNodule> _rootNodules = [];
+    private readonly Dictionary<long, ConstructionRequest> _activeConstructions = [];
 
     // GFX
     private readonly Dictionary<NoduleConnection, Tube> _tubeConnections = new();
 
     public void RegisterNodule(Nodule nodule)
     {
-        _nodules.Add(nodule);
-        _aStar.AddPoint(nodule.Id, nodule.Position);
+        _nodules.Add(nodule.NoduleId, nodule);
+        _aStar.AddPoint(nodule.NoduleId, nodule.Position);
+
+        if (nodule is RootNodule root && !_rootNodules.Contains(root))
+        {
+            _rootNodules.Add(root);
+        }
 
         UpdateNoduleConnections();
         UpdateTubesAndAstar();
@@ -30,31 +41,208 @@ public partial class NoduleManager
         UpdateTubesAndAstar();
     }
 
+    public void OnNoduleConstructed(Nodule nodule)
+    {
+        // Add all AStar connections that were skipped during construction
+        foreach (var neighbor in nodule.Connections)
+        {
+            _aStar.ConnectPoints(nodule.NoduleId, neighbor.NoduleId);
+        }
+
+        // Convert ghost tubes where BOTH sides are now fully constructed
+        foreach (var (conn, tube) in _tubeConnections)
+        {
+            if (tube.IsGhost && (ReferenceEquals(conn.A, nodule) || ReferenceEquals(conn.B, nodule)))
+            {
+                if (!conn.A.IsConstructing && !conn.B.IsConstructing)
+                    tube.SetGhost(false);
+            }
+        }
+    }
+
+    public void RequestConstruction(Nodule target)
+    {
+        if (!target.IsConstructing)
+            return;
+
+        // Defer to allow connections to be established (physics frame overlap detection)
+        var tree = target.GetTree();
+        tree.CreateTimer(0.1f).Timeout += () => TryStartConstruction(target);
+    }
+
+    private void TryStartConstruction(Nodule target)
+    {
+        // Constructing nodule has no AStar connections yet — route via neighbors
+        var (sourceRoot, waypoints) = FindPathViaNeighbors(target);
+        if (sourceRoot == null || waypoints.Length == 0)
+        {
+            // No path yet — retry periodically until a RootNodule becomes reachable
+            // TODO: ist das hier richtig?
+            var tree = target.GetTree();
+            tree.CreateTimer(ConstructionRetryInterval).Timeout += () =>
+            {
+                if (target.IsConstructing && !_activeConstructions.ContainsKey(target.NoduleId))
+                    TryStartConstruction(target);
+            };
+            return;
+        }
+
+        var request = new ConstructionRequest
+        {
+            Target = target,
+            SourceRoot = sourceRoot,
+            Waypoints = waypoints,
+        };
+
+        _activeConstructions[target.NoduleId] = request;
+        SendNextPackage(request);
+    }
+
+    private void SendNextPackage(ConstructionRequest request)
+    {
+        var target = request.Target;
+
+        if (!target.IsConstructing)
+        {
+            _activeConstructions.Remove(target.NoduleId);
+            return;
+        }
+
+        var energyStorage = request.SourceRoot.GetNode<EnergyStorage>("EnergyStorage");
+        if (energyStorage == null || !energyStorage.TryConsume(1))
+        {
+            // Source empty — retry after a delay
+            var tree = request.SourceRoot.GetTree();
+            tree.CreateTimer(PackageSendInterval).Timeout += () =>
+            {
+                if (_activeConstructions.ContainsKey(target.NoduleId))
+                    SendNextPackage(request);
+            };
+            return;
+        }
+
+        var package = Instantiator.Instantiate<EnergyPackage>();
+        package.SetWaypoints(request.Waypoints);
+
+        // Add to tree as sibling of source root so it's visible
+        var parent = request.SourceRoot.GetParent();
+        parent?.AddChild(package);
+        package.GlobalPosition = request.Waypoints[0];
+
+        package.Arrived += () =>
+        {
+            target.ReceiveConstructionEnergy(1);
+
+            if (!target.IsConstructing)
+            {
+                _activeConstructions.Remove(target.NoduleId);
+                return;
+            }
+
+            // Send next package after a short interval
+            var tree = target.GetTree();
+            tree.CreateTimer(PackageSendInterval).Timeout += () =>
+            {
+                if (_activeConstructions.TryGetValue(target.NoduleId, out var req))
+                    SendNextPackage(req);
+            };
+        };
+    }
+
+    private (RootNodule? source, Vector2[] waypoints) FindPathViaNeighbors(Nodule target)
+    {
+        RootNodule? bestRoot = null;
+        Vector2[] bestWaypoints = [];
+        float bestDist = float.MaxValue;
+
+        foreach (var neighbor in target.Connections)
+        {
+            foreach (var root in _rootNodules)
+            {
+                var pointPath = _aStar.GetPointPath(root.NoduleId, neighbor.NoduleId);
+                if (pointPath.Length == 0)
+                    continue;
+
+                var dist = 0f;
+                for (var i = 0; i < pointPath.Length - 1; i++)
+                    dist += pointPath[i].DistanceTo(pointPath[i + 1]);
+                dist += pointPath[^1].DistanceTo(target.GlobalPosition);
+
+                if (dist < bestDist)
+                {
+                    bestDist = dist;
+                    bestRoot = root;
+                    bestWaypoints = [.. pointPath, target.GlobalPosition];
+                }
+            }
+        }
+
+        return (bestRoot, bestWaypoints);
+    }
+
+    private (RootNodule? source, long[] path) FindNearestRootNodule(Nodule target)
+    {
+        RootNodule? nearest = null;
+        float shortestDist = float.MaxValue;
+        long[] shortestIds = [];
+
+        foreach (var root in _rootNodules)
+        {
+            var ids = _aStar.GetIdPath(root.NoduleId, target.NoduleId);
+            if (ids.Length == 0)
+                continue;
+
+            var path = _aStar.GetPointPath(root.NoduleId, target.NoduleId);
+            var dist = 0f;
+            for (var i = 0; i < path.Length - 1; i++)
+            {
+                dist += path[i].DistanceTo(path[i + 1]);
+            }
+
+            if (dist < shortestDist)
+            {
+                shortestDist = dist;
+                nearest = root;
+                shortestIds = [.. ids];
+            }
+        }
+
+        return (nearest, shortestIds);
+    }
+
     private void UpdateNoduleConnections()
     {
-        foreach (var n in _nodules)
+        foreach (var nodule in _nodules.Values)
         {
-            foreach (var c in n.Connections)
+            foreach (var connected in nodule.Connections)
             {
-                _connections.Add(new NoduleConnection(n, c));
+                _connections.Add(new NoduleConnection(nodule, connected));
             }
         }
     }
 
     private void UpdateTubesAndAstar()
     {
-        foreach (var c in _connections)
+        foreach (var conn in _connections)
         {
-            if (!_tubeConnections.ContainsKey(c))
+            if (!_tubeConnections.ContainsKey(conn))
             {
                 var tube = Instantiator.Instantiate<Tube>();
-                _tubeConnections.Add(c, tube);
-                c.A.AddChild(tube);
+                _tubeConnections.Add(conn, tube);
 
-                tube.SetTarget(c.B.Position);
+                conn.A.AddChild(tube);
+                tube.SetTarget(conn.B.GlobalPosition);
 
-                // TODO: refactor this out of gfx stuff
-                _aStar.ConnectPoints(c.A.Id, c.B.Id);
+                // Ghost tubes for constructing nodules — visual only, no AStar
+                var eitherConstructing = conn.A.IsConstructing || conn.B.IsConstructing;
+                if (eitherConstructing)
+                {
+                    tube.SetGhost(true);
+                }
+                else
+                {
+                    _aStar.ConnectPoints(conn.A.NoduleId, conn.B.NoduleId);
+                }
             }
         }
     }
@@ -90,4 +278,11 @@ public partial class NoduleManager
             return HashCode.Combine(A, B);
         }
     }
+
+    private class ConstructionRequest
+    {
+        public required Nodule Target { get; init; }
+        public required RootNodule SourceRoot { get; init; }
+        public required Vector2[] Waypoints { get; init; }
+    }
 }

src/Gameplay/Nodules/BasicNodule/BasicNodule.cs

@@ -0,0 +1,3 @@
+using Slimepire.Gameplay.Nodules;
+
+public partial class BasicNodule : Nodule { }

src/Gameplay/Nodules/BasicNodule/BasicNodule.cs.uid

@@ -0,0 +1 @@
+uid://b2b2irskqp5au

src/Gameplay/Nodules/BasicNodule/BasicNodule.tscn

@@ -1,20 +1,23 @@
 [gd_scene format=3 uid="uid://cnl6t8o4mh0j3"]
 
-[ext_resource type="Script" uid="uid://cmpl0if164dba" path="res://src/Gameplay/Nodules/Nodule.cs" id="1_yembh"]
-[ext_resource type="Texture2D" uid="uid://cecg47efx7gw8" path="res://assets/simple_nodule.png" id="2_7qt20"]
-[ext_resource type="PackedScene" uid="uid://bjesfu1mfx8l5" path="res://src/Gameplay/Nodules/Components/TubeConnectionArea.tscn" id="2_inlcu"]
-[ext_resource type="PackedScene" uid="uid://3x5pqm4t5cbl" path="res://src/Gameplay/Nodules/Components/GrowArea.tscn" id="2_x44k2"]
+[ext_resource type="Script" uid="uid://b2b2irskqp5au" path="res://src/Gameplay/Nodules/BasicNodule/BasicNodule.cs" id="1_wbqr8"]
+[ext_resource type="PackedScene" uid="uid://bjesfu1mfx8l5" path="res://src/Gameplay/Components/TubeConnectionArea.tscn" id="2_dehe6"]
+[ext_resource type="PackedScene" uid="uid://3x5pqm4t5cbl" path="res://src/Gameplay/Components/GrowArea.tscn" id="3_pcav2"]
+[ext_resource type="Texture2D" uid="uid://cecg47efx7gw8" path="res://assets/simple_nodule.png" id="4_w4wqd"]
+
+[sub_resource type="CircleShape2D" id="CircleShape2D_t72h2"]
+radius = 17.029387
 
 [sub_resource type="AtlasTexture" id="AtlasTexture_7qt20"]
-atlas = ExtResource("2_7qt20")
+atlas = ExtResource("4_w4wqd")
 region = Rect2(32, 0, 32, 32)
 
 [sub_resource type="AtlasTexture" id="AtlasTexture_x44k2"]
-atlas = ExtResource("2_7qt20")
+atlas = ExtResource("4_w4wqd")
 region = Rect2(0, 0, 32, 32)
 
 [sub_resource type="AtlasTexture" id="AtlasTexture_inlcu"]
-atlas = ExtResource("2_7qt20")
+atlas = ExtResource("4_w4wqd")
 region = Rect2(64, 0, 32, 32)
 
 [sub_resource type="SpriteFrames" id="SpriteFrames_xyjsl"]
@@ -34,21 +37,18 @@ animations = [{
 "speed": 2.0
 }]
 
-[sub_resource type="LabelSettings" id="LabelSettings_x44k2"]
-font_size = 12
-outline_size = 3
-outline_color = Color(0, 0, 0, 1)
-shadow_size = 3
-shadow_color = Color(0, 0, 0, 1)
-
-[node name="Nodule" type="Node2D" unique_id=1637542829 node_paths=PackedStringArray("_tubeConnectionArea")]
+[node name="BasicNodule" type="Node2D" unique_id=1637542829 node_paths=PackedStringArray("_tubeConnectionArea", "_gfx")]
 z_index = 1
-script = ExtResource("1_yembh")
+script = ExtResource("1_wbqr8")
 _tubeConnectionArea = NodePath("TubeConnectionArea")
+_gfx = NodePath("Gfx")
 
-[node name="TubeConnectionArea" parent="." unique_id=1821668398 instance=ExtResource("2_inlcu")]
+[node name="TubeConnectionArea" parent="." unique_id=1821668398 instance=ExtResource("2_dehe6")]
 
-[node name="GrowArea" parent="." unique_id=979341496 instance=ExtResource("2_x44k2")]
+[node name="GrowArea" parent="." unique_id=979341496 instance=ExtResource("3_pcav2")]
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="GrowArea" unique_id=282097141]
+shape = SubResource("CircleShape2D_t72h2")
 
 [node name="Gfx" type="AnimatedSprite2D" parent="." unique_id=190397869]
 unique_name_in_owner = true
@@ -56,18 +56,3 @@ texture_filter = 1
 sprite_frames = SubResource("SpriteFrames_xyjsl")
 autoplay = "default"
 frame_progress = 0.120879106
-
-[node name="EnergyLabel" type="Label" parent="." unique_id=466024399]
-unique_name_in_owner = true
-anchors_preset = 5
-anchor_left = 0.5
-anchor_right = 0.5
-offset_left = -20.0
-offset_top = 14.0
-offset_right = 20.0
-offset_bottom = 31.0
-grow_horizontal = 2
-text = "5"
-label_settings = SubResource("LabelSettings_x44k2")
-horizontal_alignment = 1
-vertical_alignment = 1

src/Gameplay/Nodules/Components/EnergyProducer.cs

@@ -1,32 +0,0 @@
-using Godot;
-using Slimepire.Core;
-
-namespace Slimepire.Gameplay.Nodules.Components;
-
-public partial class EnergyProducer : Node
-{
-    [Export]
-    public float ProductionRate = 1;
-
-    private float _energy;
-
-    public override void _Ready()
-    {
-        EnergyManager.Instance.RegisterEnergyProducer(this);
-    }
-
-    public override void _Process(double delta)
-    {
-        _energy += ProductionRate * (float)delta;
-        if (_energy > 1)
-        {
-            EnergyManager.Instance.TransferEnergy(_energy);
-            _energy = 0;
-        }
-    }
-
-    public override void _ExitTree()
-    {
-        EnergyManager.Instance.RemoveEnergyProducer(this);
-    }
-}

src/Gameplay/Nodules/Components/EnergyStorage.cs

@@ -1,28 +0,0 @@
-using Godot;
-using Slimepire.Core;
-
-namespace Slimepire.Gameplay.Nodules.Components;
-
-public partial class EnergyStorage : Node
-{
-    [Export]
-    public float MaxEnergy = 100;
-
-    public float Energy { get; private set; }
-
-    public override void _Ready()
-    {
-        EnergyManager.Instance.RegisterEnergyStorage(this);
-    }
-
-    public override void _ExitTree()
-    {
-        EnergyManager.Instance.RemoveEnergyStorage(this);
-    }
-
-    public float AcceptEnergy(float energy)
-    {
-        Energy += energy;
-        return Energy;
-    }
-}

src/Gameplay/Nodules/Components/GrowArea.tscn

@@ -1,13 +0,0 @@
-[gd_scene format=3 uid="uid://3x5pqm4t5cbl"]
-
-[ext_resource type="Script" uid="uid://cfxb8wmnt7ej7" path="res://src/Gameplay/Nodules/Components/GrowArea.cs" id="1_a3tcn"]
-
-[sub_resource type="CircleShape2D" id="CircleShape2D_7qt20"]
-radius = 15.0
-
-[node name="GrowArea" type="Area2D" unique_id=979341496]
-monitorable = false
-script = ExtResource("1_a3tcn")
-
-[node name="CollisionShape2D" type="CollisionShape2D" parent="." unique_id=1616623898]
-shape = SubResource("CircleShape2D_7qt20")

src/Gameplay/Nodules/Components/TubeConnectionArea.cs

@@ -1,31 +0,0 @@
-using Godot;
-
-namespace Slimepire.Gameplay.Nodules.Components;
-
-public partial class TubeConnectionArea : Area2D
-{
-    public Action<Nodule> ConnectionAdded { get; set; }
-    public Action<Nodule> ConnectionRemoved { get; set; }
-
-    public override void _Ready()
-    {
-        AreaEntered += TubeConnectionAreaOnAreaEntered;
-        AreaExited += TubeConnectionAreaOnAreaExited;
-    }
-
-    private void TubeConnectionAreaOnAreaEntered(Area2D area)
-    {
-        if (area.GetParent() is Nodule nodule)
-        {
-            ConnectionAdded?.Invoke(nodule);
-        }
-    }
-
-    private void TubeConnectionAreaOnAreaExited(Area2D area)
-    {
-        if (area.GetParent() is Nodule nodule)
-        {
-            ConnectionRemoved?.Invoke(nodule);
-        }
-    }
-}

src/Gameplay/Nodules/Nodule.cs

@@ -1,38 +1,91 @@
 using Godot;
-using Slimepire.Gameplay.Nodules.Components;
+using Slimepire.Gameplay.Components;
 
 namespace Slimepire.Gameplay.Nodules;
 
-[SceneTree]
 public partial class Nodule : Node2D
 {
-    public long Id { get; set; } = BitConverter.ToInt64(Guid.NewGuid().ToByteArray(), 0);
+    [Export]
+    private TubeConnectionArea _tubeConnectionArea = null!;
+
+    [Export]
+    private AnimatedSprite2D _gfx = null!;
+
+    [Export]
+    public float EnergyBuildCost { get; set; } = 0f;
+
+    public float ConstructionProgress { get; set; }
+
+    public bool IsConstructing => EnergyBuildCost > 0 && ConstructionProgress < EnergyBuildCost;
 
     public List<Nodule> Connections { get; } = [];
 
-    [Export]
-    private TubeConnectionArea _tubeConnectionArea;
+    protected AnimatedSprite2D Gfx => _gfx;
+
+    public long NoduleId => (long)GetInstanceId();
 
     public override void _Ready()
     {
-        Gfx.SelfModulate = Colors.DarkOliveGreen;
-        Gfx.Play();
-
-        _tubeConnectionArea.ConnectionAdded += ConnectionAdded;
-        _tubeConnectionArea.ConnectionRemoved += ConnectionRemoved;
+        _tubeConnectionArea.AreaEntered += OnAreaEntered;
+        _tubeConnectionArea.AreaExited += OnAreaExited;
 
+        ApplyCustomizations();
         NoduleManager.Instance.RegisterNodule(this);
+
+        // render above tubes
+        ZIndex = 1;
+
+        if (IsConstructing)
+        {
+            _gfx.Modulate = new Color(1, 1, 1, 0.4f);
+        }
+        else
+        {
+            _gfx.Play();
+        }
     }
 
-    private void ConnectionAdded(Nodule nodule)
+    private void OnAreaEntered(Area2D area)
     {
-        Connections.Add(nodule);
-        NoduleManager.Instance.Update();
+        if (area.GetParent() is Nodule nodule)
+        {
+            Connections.Add(nodule);
+            NoduleManager.Instance.Update();
+        }
     }
 
-    private void ConnectionRemoved(Nodule nodule)
+    private void OnAreaExited(Area2D area)
     {
-        Connections.Remove(nodule);
-        NoduleManager.Instance.Update();
+        if (area.GetParent() is Nodule nodule)
+        {
+            Connections.Remove(nodule);
+            NoduleManager.Instance.Update();
+        }
+    }
+
+    protected virtual void ApplyCustomizations()
+    {
+        _gfx.SelfModulate = Colors.DarkOliveGreen;
+    }
+
+    public void ReceiveConstructionEnergy(float amount)
+    {
+        if (!IsConstructing)
+            return;
+
+        ConstructionProgress = Mathf.Min(ConstructionProgress + amount, EnergyBuildCost);
+
+        if (ConstructionProgress >= EnergyBuildCost)
+        {
+            OnConstructionComplete();
+        }
+    }
+
+    protected virtual void OnConstructionComplete()
+    {
+        _gfx.Modulate = Colors.White;
+        _gfx.Play();
+
+        NoduleManager.Instance.OnNoduleConstructed(this);
     }
 }

src/Gameplay/Nodules/Nodule.cs.uid

@@ -1 +1 @@
-uid://cmpl0if164dba
+uid://ycm0pzamtclm

src/Gameplay/Nodules/RootNodule/RootNodule.cs

@@ -0,0 +1,11 @@
+using Godot;
+using Slimepire.Gameplay.Nodules;
+
+[SceneTree]
+public partial class RootNodule : Nodule
+{
+    protected override void ApplyCustomizations()
+    {
+        Gfx.Modulate = Colors.Coral;
+    }
+}

src/Gameplay/Nodules/RootNodule/RootNodule.cs.uid

@@ -0,0 +1 @@
+uid://y4cpi50hsaj4

src/Gameplay/Nodules/RootNodule/RootNodule.tscn

@@ -0,0 +1,69 @@
+[gd_scene format=3 uid="uid://j15868gtem0y"]
+
+[ext_resource type="PackedScene" uid="uid://bjesfu1mfx8l5" path="res://src/Gameplay/Components/TubeConnectionArea.tscn" id="1_b03xe"]
+[ext_resource type="Script" uid="uid://y4cpi50hsaj4" path="res://src/Gameplay/Nodules/RootNodule/RootNodule.cs" id="1_root"]
+[ext_resource type="PackedScene" uid="uid://t0gdf172f65v" path="res://src/Gameplay/Components/Energy/EnergyProducer.tscn" id="2_cy5pc"]
+[ext_resource type="PackedScene" uid="uid://by6iw05ovnhq8" path="res://src/Gameplay/Components/Energy/EnergyStorage.tscn" id="2_gke5o"]
+[ext_resource type="PackedScene" uid="uid://3x5pqm4t5cbl" path="res://src/Gameplay/Components/GrowArea.tscn" id="2_tg6hi"]
+[ext_resource type="Texture2D" uid="uid://tomd3kojw0qy" path="res://assets/root_nodule.png" id="3_b03xe"]
+
+[sub_resource type="CircleShape2D" id="CircleShape2D_t72h2"]
+radius = 27.018513
+
+[sub_resource type="SpriteFrames" id="SpriteFrames_cy5pc"]
+animations = [{
+"frames": [{
+"duration": 1.0,
+"texture": ExtResource("3_b03xe")
+}],
+"loop": 1,
+"name": &"default",
+"speed": 2.0
+}]
+
+[sub_resource type="LabelSettings" id="LabelSettings_cdcnu"]
+font_size = 12
+outline_size = 3
+outline_color = Color(0, 0, 0, 1)
+shadow_size = 3
+shadow_color = Color(0, 0, 0, 1)
+
+[node name="RootNodule" type="Node2D" unique_id=1797926942 node_paths=PackedStringArray("_tubeConnectionArea", "_gfx")]
+z_index = 1
+script = ExtResource("1_root")
+_tubeConnectionArea = NodePath("TubeConnectionArea")
+_gfx = NodePath("Gfx")
+
+[node name="EnergyProducer" parent="." unique_id=1184182162 node_paths=PackedStringArray("EnergyStorage") instance=ExtResource("2_cy5pc")]
+EnergyStorage = NodePath("../EnergyStorage")
+
+[node name="EnergyStorage" parent="." unique_id=1765924301 node_paths=PackedStringArray("EnergyLabel") instance=ExtResource("2_gke5o")]
+EnergyLabel = NodePath("../EnergyLabel")
+
+[node name="TubeConnectionArea" parent="." unique_id=1821668398 instance=ExtResource("1_b03xe")]
+
+[node name="GrowArea" parent="." unique_id=979341496 instance=ExtResource("2_tg6hi")]
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="GrowArea" unique_id=1962902431]
+shape = SubResource("CircleShape2D_t72h2")
+
+[node name="Gfx" type="AnimatedSprite2D" parent="." unique_id=705500036]
+unique_name_in_owner = true
+texture_filter = 1
+sprite_frames = SubResource("SpriteFrames_cy5pc")
+autoplay = "default"
+
+[node name="EnergyLabel" type="Label" parent="." unique_id=1654733583]
+unique_name_in_owner = true
+anchors_preset = 5
+anchor_left = 0.5
+anchor_right = 0.5
+offset_left = -20.0
+offset_top = 14.0
+offset_right = 20.0
+offset_bottom = 31.0
+grow_horizontal = 2
+text = "5"
+label_settings = SubResource("LabelSettings_cdcnu")
+horizontal_alignment = 1
+vertical_alignment = 1

src/Gameplay/Tube.cs

@@ -14,13 +14,13 @@ public partial class Tube : Node2D
         float maxLength = 180;
 
         // Generate 5 points from origin to Target
-        var diff = Target.Position - Position;
+        var diff = Target.Position;
 
         var points = new Vector2[5];
-        points[0] = Position;
+        points[0] = Vector2.Zero;
         for (var i = 1; i < 4; i++)
         {
-            points[i] = points[i - 1] + diff / 5;
+            points[i] = diff * i / 5;
         }
         points[4] = Target.Position;
 
@@ -40,6 +40,17 @@ public partial class Tube : Node2D
         GenerateTube();
     }
 
+    private bool _isGhost;
+    public bool IsGhost => _isGhost;
+
+    public void SetGhost(bool ghost)
+    {
+        _isGhost = ghost;
+        Line2D.DefaultColor = ghost
+            ? new Color(0.3f, 0.49f, 0.24f, 0.3f)
+            : new Color(0.30588236f, 0.4862745f, 0.23921569f, 1f);
+    }
+
     public override void _Ready()
     {
         Line2D.Points = [];

src/Gameplay/Tube.tscn

@@ -3,7 +3,7 @@
 [ext_resource type="Script" uid="uid://dwunaa303epy6" path="res://src/Gameplay/Tube.cs" id="1_76hpl"]
 
 [sub_resource type="Curve" id="Curve_kvwlm"]
-_data = [Vector2(0, 1), 0.0, 0.0, 0, 0, Vector2(0.5, 0), 0.0, 0.0, 0, 0, Vector2(1, 1), 0.0, 0.0, 0, 0]
+_data = [Vector2(0, 1), 0.0, 0.0, 0, 0, Vector2(0.5, 0.9453219), 0.0, 0.0, 0, 0, Vector2(1, 1), 0.0, 0.0, 0, 0]
 point_count = 3
 
 [node name="Tube" type="Node2D" unique_id=226677696]
@@ -12,7 +12,7 @@ script = ExtResource("1_76hpl")
 [node name="Line2D" type="Line2D" parent="." unique_id=1553055261]
 unique_name_in_owner = true
 z_as_relative = false
-points = PackedVector2Array(0, 0, 32.6, 17, 65.2, 34, 97.799995, 51, 163, 85)
+points = PackedVector2Array(0, 0, 5.4, 18.2, 10.8, 36.4, 16.2, 54.6, 27, 91)
 width = 8.0
 width_curve = SubResource("Curve_kvwlm")
 default_color = Color(0.30588236, 0.4862745, 0.23921569, 1)
@@ -22,4 +22,4 @@ end_cap_mode = 2
 
 [node name="Target" type="Marker2D" parent="." unique_id=630564540]
 unique_name_in_owner = true
-position = Vector2(163, 85)
+position = Vector2(27, 91)

src/Gameplay/metaball.tscn

@@ -0,0 +1,32 @@
+[gd_scene format=3 uid="uid://ghg1o288grwq"]
+
+[ext_resource type="Script" uid="uid://cpj1q44qfwsps" path="res://src/Gameplay/Metaball.cs" id="1_jfklr"]
+[ext_resource type="Shader" uid="uid://8xu2s3gyxp0v" path="res://assets/shaders/metaball.gdshader" id="2_vvscw"]
+
+[sub_resource type="ViewportTexture" id="ViewportTexture_vvscw"]
+viewport_path = NodePath("SubViewport")
+
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_vvscw"]
+resource_local_to_scene = true
+shader = ExtResource("2_vvscw")
+shader_parameter/metaball_tex = SubResource("ViewportTexture_vvscw")
+shader_parameter/threshold = 0.9250000439375
+shader_parameter/color = Color(0.3, 0.5, 0.2, 1)
+
+[node name="Metaball" type="Control" unique_id=1102466349]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_jfklr")
+
+[node name="ColorRect" type="ColorRect" parent="." unique_id=1080383949]
+material = SubResource("ShaderMaterial_vvscw")
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2

src/Levels/BaseLevel.cs

@@ -5,5 +5,5 @@ namespace Slimepire.Levels;
 [GlobalClass]
 public abstract partial class BaseLevel : Node
 {
-    protected abstract Camera2D Camera { get; }
+    public abstract Camera2D Camera { get; }
 }

src/Levels/DemoLevel.cs

@@ -5,5 +5,5 @@ namespace Slimepire.Levels;
 [SceneTree]
 public partial class DemoLevel : BaseLevel
 {
-    protected override Camera2D Camera => _.Camera;
+    public override Camera2D Camera => _.Camera;
 }

src/Levels/DemoLevel.tscn

@@ -2,7 +2,8 @@
 
 [ext_resource type="Script" uid="uid://c8l12dlpexosv" path="res://src/Levels/DemoLevel.cs" id="1_l2cn0"]
 [ext_resource type="Script" uid="uid://cdgi3y0sm3rt1" path="res://src/Gameplay/Camera.cs" id="2_mxa1b"]
-[ext_resource type="PackedScene" uid="uid://cnl6t8o4mh0j3" path="res://src/Gameplay/Nodules/Nodule.tscn" id="3_qhkhc"]
+[ext_resource type="PackedScene" uid="uid://j15868gtem0y" path="res://src/Gameplay/Nodules/RootNodule/RootNodule.tscn" id="3_knlma"]
+[ext_resource type="PackedScene" uid="uid://ce2frpb21ct5l" path="res://src/Gameplay/GooSubViewPort.tscn" id="4_goo"]
 
 [sub_resource type="LabelSettings" id="LabelSettings_l2cn0"]
 font_size = 107
@@ -28,4 +29,16 @@ grow_vertical = 2
 text = "DEMO LEVEL"
 label_settings = SubResource("LabelSettings_l2cn0")
 
-[node name="Nodule" parent="." unique_id=1637542829 instance=ExtResource("3_qhkhc")]
+[node name="RootNodule" parent="." unique_id=1797926942 instance=ExtResource("3_knlma")]
+
+[node name="CanvasLayer" type="CanvasLayer" parent="." unique_id=648836414]
+
+[node name="ColorRect" type="ColorRect" parent="CanvasLayer" unique_id=1287004749]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+mouse_filter = 2
+
+[node name="GooSubViewPort" parent="." unique_id=348721885 instance=ExtResource("4_goo")]