I enjoy a good, fast-paced word game.  Thanks to YSMarko, which unfortunately is no longer updated, I found this one called Deep Leap.  The game is Scrabble-like.  You start with 4 tiles, and tiles are slowly added to your rack.  You type words created from the letters in your rack.  If you have more than 9 tiles in your rack, the oldest ones disappear.  You earn points by using your letters, with multipliers for word length and the number of consecutive words that appear in the dictionary.  You lose points for letters that you don’t use before they expire or for typing words that don’t appear in the dictionary.  Games are only 75 tiles long, so that can be played in just a few minutes.  It’s kind of addicting.  Give it a try.  But if you can’t stop, don’t blame me.