Touch any letters whether or not they're connected to select them and form words. You can touch a letter a second time to deselect it, or just touch the clear button to deselect them all at once. In Drop'Em mode, play continues until either the countdown timer expires, you manually exit the game by touching the timer when in Marathon mode, or if one of your columns reach the clouds. In Replace'Em mode, play continues until the timer expires or exit anytime by touching the game timer. In Clear'Em mode, try to use all your letters as quickly as possible.

Well, that's about it. Hours of mind-stretching fun and enjoyment are just a click away. Enjoy!