Players clear blocks that come down by lining them up in horizontal or vertical lines of three or more blocks. The lines have to have the same kind of block. As new blocks come down, the playfield rises. If it makes it to the top, the player loses. The player can stop the playfield from rising by clearing blocks. In two-player games, clearing more than one line at once making combos causes "garbage" blocks to come down on the opponent's side of the field. Garbage blocks can be cleared by clearing lines below it.