+ self._apply_events(self._scene.enter(self._world.proxy()))
+
+ def change_world(self, *args, **kw):
+ self._world.apply_event(*args, **kw)
+
+ def quit_game(self):
+ from pgzero.game import exit
+ exit()
+
+ def move_screen(self, offset):
+ self._viewport = (self._viewport[0] + offset[0],
+ self._viewport[1] + offset[1])