This is an MMO puzzle game. It has very nice cartoony graphics and fun gameplay. Since it is a "kid" game, it also lacks the annoying trolls of most "free" games. I can't think of anything to complain about in this game. I love it!
The puzzles are very interesting and there is a form of leveling, albeit abstract. A pretty deep player economy is built in as well. The entire game is well put together, even if the graphics and sounds aren't of Galaxies caliber.