Bricks fall, you shoot! Simple as that, but addictive as hell.
Find your best strategy. Fire as many bullets as fast as possible, or carefully aim for that perfect combo-shot.
Your actions make sounds, and those sounds make music. You are composing your own ambient, relaxing soundtrack.
Relax and focus in the same time. Playing this game will recharge your strength to increase your productivity, or... well... it might waste a bit too much of your precious time, since its so addictive:)