Use the touch screen to form words using adjacent letters. Minimum 2 letters, maximum 15 letters per word. The total points you get for a word is heavily based on the length of the word. When you form a word, your block count and your score increases, the blocks used for making that word fall down, and new blocks cascade into place. The block count (upper right corner) is used for determining the likelihood of getting a red block. When block count reaches 300, half of all new blocks will be red. Each red block comes with a number, visible on the left side of letter. Every time you create a word or shuffle, all the red blocks on the screen will have their counters decrease by 1. If you let any of the red block counters go past 0, game will be over. Green blocks are bonus blocks that double the word's score when they are used in a word. The green block bonus will stack if you use more than one green block in a word. If you can't find any good words, you can shuffle.