Overhaul game state logic to support gameplay loop

Zennysoft.Game.Ma.Implementation/App/State/States/AppLogic.State.LoadingSaveFile.cs

@@ -15,7 +15,7 @@ public partial class AppLogic
         this.OnEnter(() => Output(new Output.StartLoadingSaveFile()));
       }
 
-      public Transition On(in Input.SaveFileLoaded input) => To<InGame>();
+      public Transition On(in Input.SaveFileLoaded input) => To<GameStarted>();
     }
   }
 }