Can't stop playing it.
http://67.205.67.171/index.php?option=com_content&task=view&id=148&Itemid=2

Oh gosh. Try habbo.com. It's a chatroom, and I went around it until 3am.

EDIt: tried it for a few levels. It's dangerously addictive.

seems like some physics based game that i cant take the time to really learn about (at the moment), but if you like it, theres a game called armadillo run which you might like.
http://www.armadillorun.com/

curve ball :-)
an old, classic game, but i often cant stop playing it =)
http://www.fetchfido.co.uk/games/curve_ball/curve_ball.htm