The objective of Worm Worm is to form words using adjacent letters. You can move up and down, left and right, as long as you are forming a word. Once you have formed a word, press Submit, earn points, and watch the letters disappear. To get a feel for the game, try Freeplay mode. Freeplay mode allow you to play at your own pace because there is no time limit.
For a real challenge, select Time Trial. You're given two minutes to reach 20 points. Each round requires progressively more points. And Word Worm won't let you cheat! If you try submitting a word that isn't a word, it simply won't work. If it really is a word but isn't in the Word Worm dictionary, please don't get mad. Send an e-mail, and Word Worm will gladly include it.