You don’t actually connect the words the way you do on a Scrabble board, just make a word as fast as possible with the tiles given. Premium squares show up in random spots to challenge your skills. The object is to use all 64 letters before the time runs out, while getting as many points as you can. Each time the clock runs out, your total score and that of the highest scoring word are displayed.
Tell me that’s not addictive to word nerds!