A nice blend between a platform game, a shoot'em'up and columns. You have to shoot the blocks that appear, and any adjacent to the one you hit with the same colour disappear as well. You don't want to shoot too much though, as you'll hit the spikes at the bottom. Also there's coinage to collect. As I said, a really nice blend, try it here. Also the author states that there's a deluxe version coming up, so keep an eye for it if you like this game!