You can get this game for your page too (and about a dozen other cool applets at Katsten's Applet page
Epinions gives it 5 stars
Buy it and the add on deck 2, 3 and 4 from eBay
Or try the Set game.
Or try the page that my mom set up with tons of educational/fun web sites.
Play it at www.puzz.com
Here are a dozen other puzzles including Rush Hour
What else would you expect from a site named puzzles.com