A computer version of those frustrating little square games that were so popular several years ago, complete with annoying sound effects!
You play the game in a new window which will open miraculously when you click 'Start Slide Puzzle' below.
Click 'Scramble' to, er, scramble, and then move squares next to the blank square to slide the piece along. You'll see - it's not difficult to understand. Mind you, it's not easy to get the picture to look anything like it should, though...
Start Slide Puzzle