FREE: Micron [Steam Key]

The listing, Micron [Steam Key] has ended.

Micron is a unique fusion of puzzle and rhythm gameplay. Place pieces on the board to deflect bullets of energy that fire to the beat. Guide the bullets to the exit through 51 challenging levels — and 12 bonus levels — featuring a variety of distinctive soundscapes. Your solutions create the music.
Award-Winning Design
Micron began as a game created for Kongregate's 'Project Eden: Experience the Music' game contest, in which it won 2nd place. The judges included Tetsuya Mizuguchi, creator of REZ and LUMINES, and representatives from Ubisoft, Gamespot, and Kongregate.

More info: http://store.steampowered.com/app/290380/
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This game works on mac and linux too!

Good Luck!