I LOVE Word Slinger. You can play in a timed or untimed mode. You are given a list of words and must form crossword puzzles. Each puzzle requires you to make a certain number of word crosses (you can earn extra points for making new words); and the puzzles get increasingly harder as you move along. You will begin to get blocker squares and other challenges as you move up the levels. You also have the option to keep playing after you reach your goal for more points. I highly recommend this addictive word game. Thumbs up!