POLARIUM mixes way cool gameplay with an electronica soundtrack for the trippiest experience yet on the DS. It's the first game that would look cool at a rave. If you mark a tile with your stylus, it will flip from black to white or vice versa. If you mark an entire row, column or block of tiles, they'll flip individually. The object is to make room for tiles falling from the top screen by clearing rows of tiles below. You do this by flipping the tiles to make rows that are all black or all white.