4Taps - An easy impossible game

4Taps is a game which is really easy to understand, but will become extremely difficult the more you play it.

The concept is simple, just press on a circle and other 4 circles will pop near it. However, if there are already some circles, those ones will be deleted.

The goal is to create the shape shown on the background orange circles without having any spare circles. That is much harder than you think!!