You will be challenged to sort the balls in a game with several levels of difficulty. If you are really stuck in a level you can choose to add a tube to help you out.

You can always start the game from the beginning if you want to retrace your steps and try to find a better way to sort the balls. You can also use the back button to do that.

The more you play the more you will learn how to do it faster and more efficiently. The game is really fun and relaxing. It makes you think and exercise your brain.