Should fix index error.

robotgame/level.py

@@ -78,11 +78,14 @@ class Level(object):
     def _sorted_objs(self, objs=None):
         return sorted(self.objects if objs is None else objs,
                       key=lambda obj: (obj.y + obj.z))
-        
+
     def draw(self, window):
         self._blit_background(window)
 
         for obj in self._sorted_objs():
-            obj.draw(window)
+            try:
+                obj.draw(window)
+            except IndexError:
+                print("Skipping frames ...")
 
         self.darkness.draw(window)

robotgame/level1.py

@@ -507,7 +507,7 @@ class Level1(level.Level):
 
         for i in range(3):
             self.objects.append(
-                CompletionBlock(self, 64 * (door_x - 6 + i), 48 * 4,
+                CompletionBlock(self, 64 * (door_x - 5 + i), 48 * 4,
                                 self.solution[i], i + 1))
 
         # DRAW THE BACKGROUND