The objective is to make selections before the time runs out. To make a selection, tap four balls of the same color that makes corners for a rectangle. Watch out! The solution might not always look that obvious.
If you make a selection, you will be given some points and extra time. Keep playing and making rectangles before the time runs out to get as most points as you can.
At the moment the game is on BETA stage. You can play as I finish it but the game might have bugs or things might not work correctly. If you find a bug, I ask you to report it at the issue tracker.