Your only aim in this simple but challenging game is not to let white ball to fall from platform. You can jump and bounce off the walls to avoid the ball falling.
Use LEFT and RIGHT ARROW KEYS to rotate the platform. And use DOWN ARROW KEY to jump (hold down for higher jump). There are different bonuses in the game. Some of them you can collect and use when it necessary (use 1-4 KEYS to activate them), but other activates immediately and can hurt you.