The board consists of several layers of tiles. You play by selecting matching pairs of tiles. The tiles must be on the left or right hand edges of the board or the row they are on. It features three different game types, FIVE skill levels, sound effects and FOUR choices of background. The boards are tailored for the iPhone and larger iPad screens. It also has Game Centre functionality built in with a load of achievements to collect. It is compatible with iOS 3.2 and above.