Sound file error hopefully fixed for pyinstaller.

src/game_selection.py

@@ -95,3 +95,26 @@ def get_level_path(game_dir, level_num):
 
     level_path = os.path.join(base_path, "levels", game_dir, f"{level_num}.json")
     return level_path
+
+
+def get_game_dir_path(game_dir):
+    """Get full path to game directory for end.ogg and other game files.
+    
+    Args:
+        game_dir (str): Game directory name
+        
+    Returns:
+        str: Full path to game directory
+    """
+    if game_dir is None:
+        raise ValueError("game_dir cannot be None")
+        
+    # Handle PyInstaller path issues - same logic as get_level_path
+    if hasattr(sys, "_MEIPASS"):
+        # Running as PyInstaller executable
+        base_path = sys._MEIPASS
+    else:
+        # Running as script
+        base_path = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+        
+    return os.path.join(base_path, "levels", game_dir)