SpeedCluster, by Game-Pure, is an arcade Flash game that is remarkably easy to play: just drag cards from along the bottom row onto one of the four blue markers at the base of each column where random cards will fall. The cards you drag must be either one higher or one lower in value than the one that is falling. This forms a combo, and you earn points for additional cards that you add to a combo before it disappears out of play. You also earn time for creating combos; precious time with which to continue playing. The game ends when you run out of time.