Based on Valve’s latest hit, Portal: The Flash Version brings it all up in 2d!
Portal: The Flash Version includes over 40 challenging, portals thinking levels, which features almost every feature the real game does, in 2d – energy balls, cubes, turrets and even the famous crusher from the trailer. The game also includes a console to mess around with after finishing the game, or just being frustrated by thinking with portals (Commands are posted in our forums).
*level 32 energy ball bug: A quick solution is to hit the “O” button once so it changes the quality to medium, then the ball will be released and the lvl will be solvable. Then if you wish simply hit twice again so the quality will set back to low. It solved the problem for me on ff 2 and ie 7.