Choose a playing mode: Infinite fall, with no time limits, or the Challenge mode! Then tilt the screen so that the ball goes through the shelf labyrinth. Trace it, or the game is over! I bet, it's the best way to check your gyro.
Try to pass all the shelves as fast, as possible! Tilt your phone to place the ball into the holes! The ball is always speeding up - don't be sleepy and fallow it! In the end of each game you can see the score: try to make the new record!