Handle exit elevators and secret levels

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

lib/features/screens/episode_screen.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:wolf_3d_data_types/wolf_3d_data_types.dart';
 import 'package:wolf_dart/features/screens/difficulty_screen.dart';
 import 'package:wolf_dart/wolf_3d.dart';
 
@@ -10,15 +11,6 @@ class EpisodeScreen extends StatefulWidget {
 }
 
 class _EpisodeScreenState extends State<EpisodeScreen> {
-  final List<String> _episodeNames = [
-    "Episode 1\nEscape from Wolfenstein",
-    "Episode 2\nOperation: Eisenfaust",
-    "Episode 3\nDie, Fuhrer, Die!",
-    "Episode 4\nA Dark Secret",
-    "Episode 5\nTrail of the Madman",
-    "Episode 6\nConfrontation",
-  ];
-
   @override
   void initState() {
     super.initState();
@@ -36,7 +28,7 @@ class _EpisodeScreenState extends State<EpisodeScreen> {
 
   @override
   Widget build(BuildContext context) {
-    final int numberOfEpisodes = Wolf3d.I.activeGame.numberOfEpisodes;
+    final List<Episode> episodes = Wolf3d.I.activeGame.episodes;
 
     return Scaffold(
       backgroundColor: Colors.black,
@@ -56,8 +48,9 @@ class _EpisodeScreenState extends State<EpisodeScreen> {
             const SizedBox(height: 40),
             ListView.builder(
               shrinkWrap: true,
-              itemCount: numberOfEpisodes,
+              itemCount: episodes.length,
               itemBuilder: (context, index) {
+                final Episode episode = episodes[index];
                 return Padding(
                   padding: const EdgeInsets.symmetric(
                     vertical: 8.0,
@@ -74,7 +67,7 @@ class _EpisodeScreenState extends State<EpisodeScreen> {
                     ),
                     onPressed: () => _selectEpisode(index),
                     child: Text(
-                      _episodeNames[index],
+                      episode.name,
                       textAlign: TextAlign.center,
                       style: const TextStyle(fontSize: 18),
                     ),