Validate all level data before starting game. No more getting to level 10 before realizing there's an error in the json syntax. Notify players when the level is locked with a boss level message.

wicked_quest.py

@@ -60,6 +60,30 @@ class WickedQuest:
         except FileNotFoundError:
             return False
 
+    def validate_levels(self):
+        """Check if level files have valid JSON."""
+        errors = []
+    
+        # Check levels from 1 until no more files are found
+        levelNumber = 1
+        while True:
+            levelPath = get_level_path(self.currentGame, levelNumber)
+            if not os.path.exists(levelPath):
+                break
+            
+            try:
+                with open(levelPath, 'r') as f:
+                    # This will raise an exception if JSON is invalid
+                    json.load(f)
+            except json.JSONDecodeError as e:
+                errors.append(f"Level {levelNumber}: Invalid JSON format - {str(e)}")
+            except Exception as e:
+                errors.append(f"Level {levelNumber}: Error reading file - {str(e)}")
+            
+            levelNumber += 1
+    
+        return errors
+
     def handle_input(self):
         """Process keyboard input for player actions."""
         keys = pygame.key.get_pressed()
@@ -305,6 +329,14 @@ class WickedQuest:
                 exit_game()
             elif choice == "play":
                 self.currentGame = select_game(self.sounds)
+                # Validate level files before starting
+                errors = self.validate_levels()
+                if errors:
+                    errorLines = ["Level files contain errors:"]
+                    errorLines.extend(errors)
+                    errorLines.append("\nPlease fix these errors before playing.")
+                    display_text(errorLines)
+                    continue
                 if self.currentGame:
                     self.player = None  # Reset player for new game
                     self.gameStartTime = pygame.time.get_ticks()