Made lever toggle arrow block.

robotgame/worldobject.py

@@ -31,7 +31,7 @@ import copy
 class WorldObject(object):
     def __init__(self, level, x, y, z=0, direction=(1, 0), speed=4,
                  tile_x=64, tile_y=48,
-                 movable=False):
+                 movable=False, blocking=True):
         self.__dict__.update(locals())
 
         self.init_x = self.move_x = self.x = self.x - (self.x % self.tile_x)
@@ -54,8 +54,8 @@ class WorldObject(object):
             for obj in self.level.objects:
                 if (obj.x == self.x + move_x * self.tile_x
                     and obj.y == self.y + move_y * self.tile_y
-                    and obj != self and obj != self.holder
-                    and obj != self.holding):
+                    and obj is not self and obj is not self.holder
+                    and obj is not self.holding and obj.blocking):
                     return False
             return True
         return False