A ball here, a ball there until you dismiss all of them. Think and flick them from the game area and continue into the next level with more tasks. How simple and entertaining.
The game area with marbles pushes you to mobilization of your brain. Use marbles to push out another marbles until there is not even a single one. Objects stop when bump into other objects creating positions for your next move. The one move back is really useful. When you make a mistake, you can move back using the arrow.