Loading screen fixes, transition screen UI fixes

Zennysoft.Game.Ma/src/game/Game.cs

@@ -58,6 +58,8 @@ public partial class Game : Node3D, IGame
   public delegate void SaveFileLoadedEventHandler();
 
   public event Action GameExitRequested;
+
+  public event Action GameLoaded;
   #endregion
 
   public RescuedItemDatabase RescuedItems { get; set; } = default!;
@@ -200,6 +202,7 @@ public partial class Game : Node3D, IGame
     _effectService = new EffectService(this, _player, _map);
     _player.Activate();
     await _map.LoadFloor();
+    GameLoaded?.Invoke();
   }
 
   public async Task Save() => await SaveFile.Save();