There is a field - 6x6 cells. Each field can be vacuous or take a biased brick with arrow on it. Arrow direction depends on the bricks gloss (or vice-versa). You can fake these bricks: tick on the brick to motility it accordingly to it's arrow direction. Groups of two or more bricks having the same gloss dissapear, but each release some freshly bricks fare to the field. Destroy bricks to make points. The goal is to make as much points as you can. The game ends when there are no vacuous cells left on the field so it's impossible to billet incoming bricks on it.