Re-added the sprite screen. Made some adjustments to enemy AI.

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

lib/screens/episode_screen.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:wolf_3d_data_types/wolf_3d_data_types.dart';
 import 'package:wolf_3d_flutter/wolf_3d.dart';
 import 'package:wolf_dart/screens/difficulty_screen.dart';
+import 'package:wolf_dart/screens/sprite_gallery.dart';
 
 class EpisodeScreen extends StatefulWidget {
   const EpisodeScreen({super.key});
@@ -31,7 +32,19 @@ class _EpisodeScreenState extends State<EpisodeScreen> {
     final List<Episode> episodes = Wolf3d.I.activeGame.episodes;
 
     return Scaffold(
-      backgroundColor: Colors.black,
+      backgroundColor: Colors.teal,
+      floatingActionButton: IconButton(
+        onPressed: () {
+          Navigator.of(context).push(
+            MaterialPageRoute(
+              builder: (context) {
+                return SpriteGallery(sprites: Wolf3d.I.sprites);
+              },
+            ),
+          );
+        },
+        icon: Icon(Icons.bug_report),
+      ),
       body: Center(
         child: Column(
           mainAxisAlignment: MainAxisAlignment.center,