Add game scene and level catalog interfaces, and implement scene management in AppRoot

features/level/ExitDoorComponent.cs

@@ -0,0 +1,40 @@
+using Chickensoft.AutoInject;
+using Chickensoft.Introspection;
+using Godot;
+using Mr.BrickAdventures.app;
+using Mr.BrickAdventures.game.services;
+
+namespace Mr.BrickAdventures.features.level;
+
+[Meta(typeof(IAutoNode))]
+public partial class ExitDoorComponent : Area2D
+{
+    public override void _Notification(int what) => this.Notify(what);
+
+    [Export] public CollisionShape2D UnlockIndicator { get; set; } = null!;
+    [Export] public bool Unlocked { get; set; } = false;
+
+    [Dependency] public LevelService Levels => this.DependOn<LevelService>();
+    [Dependency] public ILevelCatalog Catalog => this.DependOn<ILevelCatalog>();
+    [Dependency] public IGameScenes Scenes => this.DependOn<IGameScenes>();
+
+    public void OnReady() {
+        BodyEntered += OnBodyEntered;
+        UpdateVisuals();
+    }
+
+    private void OnBodyEntered(Node body) {
+        if (!Unlocked) return;
+        if (body is not CharacterBody2D) return;
+
+        var nextIdx = Levels.CompleteAndAdvance();
+        var next = Catalog.Get(nextIdx);
+        if (next != null) Scenes.Load(next); else Scenes.ReturnToMain(Catalog.MainMenu);
+    }
+
+    private void UpdateVisuals() {
+        if (UnlockIndicator != null) UnlockIndicator.Disabled = !Unlocked;
+    }
+
+    public void SetUnlocked(bool value) { Unlocked = value; UpdateVisuals(); }
+}

features/level/ExitDoorComponent.cs.uid

@@ -0,0 +1 @@
+uid://ddh0jm0heqtc3

features/ui/menus/GameOverScreen.cs

@@ -0,0 +1,26 @@
+using Chickensoft.AutoInject;
+using Chickensoft.Introspection;
+using Godot;
+using Mr.BrickAdventures.app;
+
+namespace Mr.BrickAdventures.features.ui.menus;
+
+[Meta(typeof(IAutoNode))]
+public partial class GameOverScreen : Control
+{
+    public override void _Notification(int what) => this.Notify(what);
+
+    [Export] public Button RestartButton { get; set; } = null!;
+    [Export] public Button MainMenuButton { get; set; } = null!;
+    [Export] public PackedScene MainMenuScene { get; set; } = null!;
+
+    [Dependency] public IGameScenes Scenes => this.DependOn<IGameScenes>();
+
+    public void OnReady() {
+        Visible = false;
+        RestartButton.Pressed += () => Scenes.Restart();
+        MainMenuButton.Pressed += () => Scenes.ReturnToMain(MainMenuScene);
+    }
+
+    public void ShowGameOver() => Show();
+}

features/ui/menus/GameOverScreen.cs.uid

@@ -0,0 +1 @@
+uid://b36jv878751ta

features/ui/menus/MainMenu.cs

@@ -1,6 +1,7 @@
 using Chickensoft.AutoInject;
 using Chickensoft.Introspection;
 using Godot;
+using Mr.BrickAdventures.app;
 using Mr.BrickAdventures.game.repositories;
 using Mr.BrickAdventures.game.services;
 
@@ -20,10 +21,11 @@ public partial class MainMenu : Control
     [Export] public Label VersionLabel { get; set; } = null!;
     [Export] public Control SettingsControl { get; set; } = null!;
     [Export] public Control CreditsControl { get; set; } = null!;
-    [Export] public PackedScene FirstLevelScene { get; set; } = null!;
 
     [Dependency] public SaveService Save => this.DependOn<SaveService>();
     [Dependency] public LevelRepository Levels => this.DependOn<LevelRepository>();
+    [Dependency] public IGameScenes Scenes => this.DependOn<IGameScenes>();
+    [Dependency] public ILevelCatalog Catalog => this.DependOn<ILevelCatalog>();
 
     public void OnReady() {
         VersionLabel.Text = $"v. {ProjectSettings.GetSetting("application/config/version")}";
@@ -44,15 +46,13 @@ public partial class MainMenu : Control
     private void OnNewGamePressed() {
         Save.NewGame();
         Levels.SetCurrent(0);
-        GetTree().ChangeSceneToPacked(FirstLevelScene);
+        var first = Catalog.First;
+        Scenes.Load(first);
     }
 
     private void OnContinuePressed() {
-        if (!Save.TryLoad()) {
-            // Fallback: start new game
-            OnNewGamePressed();
-            return;
-        }
-        GetTree().ChangeSceneToPacked(FirstLevelScene);
+        if (!Save.TryLoad()) { OnNewGamePressed(); return; }
+        var scene = Catalog.Get(Levels.Current) ?? Catalog.First;
+        Scenes.Load(scene);
     }
 }

features/ui/menus/PauseMenu.cs

@@ -1,6 +1,33 @@
+using Chickensoft.AutoInject;
+using Chickensoft.Introspection;
+using Godot;
+using Mr.BrickAdventures.app;
+using Mr.BrickAdventures.game.services;
+
 namespace Mr.BrickAdventures.features.ui.menus;
 
-public class PauseMenu
+[Meta(typeof(IAutoNode))]
+public partial class PauseMenu : Control
 {
+    public override void _Notification(int what) => this.Notify(what);
+
+    [Export] public Button ResumeButton { get; set; } = null!;
+    [Export] public Button RestartButton { get; set; } = null!;
+    [Export] public Button MainMenuButton { get; set; } = null!;
+
+    [Dependency] public IGameScenes Scenes => this.DependOn<IGameScenes>();
+    [Dependency] public ILevelCatalog Catalog => this.DependOn<ILevelCatalog>();
+    [Dependency] public LevelService Levels => this.DependOn<LevelService>();
     
+    public void OnReady() {
+        Visible = false;
+        ResumeButton.Pressed += () => { GetTree().Paused = false; Hide(); };
+        RestartButton.Pressed += () => { GetTree().Paused = false; Scenes.Restart(); };
+        MainMenuButton.Pressed += () => { GetTree().Paused = false; Scenes.ReturnToMain(Catalog.MainMenu); };
+    }
+
+    public void Toggle() {
+        if (Visible) { GetTree().Paused = false; Hide(); }
+        else { Show(); GetTree().Paused = true; }
+    }
 }