Very addictive brain teaser. The goal is to make sure all the blocks in each row are the same color (be it white or black). Considering that various puzzles are submitted by users, the difficulty ranges from very easy to almost impossible.
This game has alot going for it: UGC (user generated content), slick implementation, decent sound, playability and graphics. There needs to be an option to play "MEDIUM" difficulty puzzles though - all the easy puzzles were too easy and the hard ones were too hard (for me!).