What online game is this?

About a year ago, someone I knew gave the URL to a site. There was a game on it and I can't remember what it was, and I feel like playing it again. It was a brain teaser game, or whatever they're called (where you have to figure out to get through a room and stuff). There were different levels you had to get through too. One of them involved having to move around the tiles or something to get to the cheese for the mouse (don't even ask , I'm pretty sure that's actully not it). But anyways, I just can't remember what it was. Any ideas what it could be?