Game rules. Bring back classic game that you played in your childhood but even more fun and challenge with 3 different modes with up to total 35 tetrominoes: Easy mode: with total 7 classic tetrominoes. Medium mode: include 7 classic tetrominoes and 12 rare tetrominoes. Hard mode: include 7 classic tetrominoes, 12 rare tetrominoes and 16 ultra rare tetrominoes.