As many of you know, the Orange Box was released a couple weeks ago, containing the highly anticipated Team Fortress 2 and Portal. Anyone that has played or seen Portal knows that it's one of the best physics and/or puzzle game since Prey. If you haven't seen it, here's a video of the gameplay:
http://www.gametrailers.com/player/17606.html
Anyways, my friend, Homero, was doing some searching for more info on Portal, and came across a 2-D version online. It's ridiulously fun and some parts are actually a bit challenging.
I recommend you use the WASD keys to move, shoot the blue portal using Q and the yellow one using E...hitting R will remove both of them. In any case, it is a REALLY addicting game, enjoy:
http://portal.wecreatestuff.com/