Rework game over logic and game initialization

Zennysoft.Game.Ma.Implementation/Game/state/GameState.Input.cs

@@ -8,10 +8,6 @@ public partial class GameState
 
     public readonly record struct LoadGame;
 
-    public readonly record struct ContinueGame;
-
-    public readonly record struct ReturnToMainMenu;
-
     public readonly record struct LoadNextFloor;
 
     public readonly record struct InventoryButtonPressed;