Rework game over logic and game initialization

Zennysoft.Game.Ma.Implementation/Game/state/gamestates/GameState.State.FloorExitScreen.cs

@@ -8,7 +8,7 @@ public partial class GameState
   public partial record State
   {
     [Meta, LogicBlock(typeof(State), Diagram = true)]
-    public partial record FloorExitScreen : State, IGet<Input.LoadNextFloor>, IGet<Input.ReturnToMainMenu>
+    public partial record FloorExitScreen : State, IGet<Input.LoadNextFloor>
     {
       public FloorExitScreen()
       {
@@ -20,11 +20,6 @@ public partial class GameState
         Output(new Output.LoadNextFloor());
         return To<InGame>();
       }
-
-      public Transition On(in Input.ReturnToMainMenu input)
-      {
-        return To<MainMenu>();
-      }
     }
   }
 }