No Friction

In this simple puzzle game, you control a rolling ball that has to collect the
green dots and make it to the end of each level. The ball can only be sent
rolling if it's sitting still, and it only stops when it hits a wall; it can't
change direction once it's moving. It sounds simple, but there are 20
progressively harder levels - only a master can beat them all, and piece
together the code that reveals the solution to Level X. There is also a secret
level, and the entrance is hidden underneath a breakable block somewhere in the
game.