WIP fixing menu rendering in CLI ASCII mode

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

apps/wolf_3d_gui/lib/screens/game_screen.dart

@@ -31,15 +31,19 @@ class _GameScreenState extends State<GameScreen> {
   void initState() {
     super.initState();
     _engine = widget.wolf3d.launchEngine(
-      onGameWon: () => Navigator.of(context).pop(),
+      onGameWon: () {
+        _engine.difficulty = null;
+        widget.wolf3d.clearActiveDifficulty();
+        Navigator.of(context).pop();
+      },
     );
   }
 
   @override
   Widget build(BuildContext context) {
-    return PopScope<Object?>(
+    return PopScope(
       canPop: _engine.difficulty != null,
-      onPopInvokedWithResult: (didPop, result) {
+      onPopInvokedWithResult: (didPop, _) {
         if (!didPop && _engine.difficulty == null) {
           widget.wolf3d.input.queueBackAction();
         }