Arkanoid is great thing. This game is something similar. Do you remember the legendary game called Clusterz? So this principle is used in this game. You can see several ball in different colours. You have one ball with certain colour. So shoot it into the group of same coloured marbles to get rid of them. When you put out all the marbles you continue into the next level. The game has really nice graphic but with some lights that can confuse you.