Portal

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!

Controls
Left mouse button – launch a portal.
A W D – movement
Q – launch a blue portal.
E – launch a yellow portal.
R – Close both portals.
F – pick up an object.
~ – open up console (enable through the options)
O – quick quality adjust.
Esc/P – pause game.