Descent II

Here is the ball that you'll accompany all the way and even more you'll change the polarity of the rooms that would balloon could fly between portals and come across walls here it is forbidden! As soon as the ball goes through the portal to a new room right away, try as quickly as possible to deploy the polarity of the room, so do not forget to slow down and the ball is that he did not receive a high speed and you have time to turn the room!