Letter stones keep dropping into the tower. Spell words of three letters or more by tapping stones that touch each other, including diagonally, then tap ✓. Cleared stones vanish and the ones above tumble down. Rare letters are worth more, longer words multiply your points, and stones marked ✦ double the whole word. If any column reaches the top, the tower falls. Stuck? Hint finds a good word on the board and selects it for you. You start with three hints and earn one more each time you level up.