Stay Up Mahjong

Match two identical free tiles to clear them. A tile is free when nothing's on top of it and its left or right side is open. Stuck? Tap a tile, then the Bench, to park it out of the way. Parked tiles can still be matched. The Bench holds 3: fill all 4 spots and you're out. Win Pyramid, Twin Towers, Fortress in a row for 10% off.