Spell as many words as you can as the tiles rain down from the top of the screen. The game is not over until the board is completely filled. Words must be a minimum of three letters long to be played. Blue tiles are worth standard points, and green tiles are power tiles, worth bonus points, and will clear the entire row they are in. There are four types of power-ups to help you during gameplay: Lightning will remove an entire block of letters Snow will freeze time for ten seconds Stopwatch will slow down the speed of the game Question Mark will turn any tile into a wildcard letter Power-ups (except for the wildcard) will fall from the top of the screen. You can also press and hold on any tile to pull up your power-up inventory, where you can play any of the four power-ups, if you have them available. You can always purchase more to help you out! If you are stuck, you can shake your phone up to three times per game to scramble the game board.