Just found an unauthorized version of Portal on the interweb. Its a flash version and not authorized by valve, although they do give props to them. Check it out:

http://portal.wecreatestuff.com

quite a good rendition of the game, and just like the real thing, I got bored pretty quickly.

blister, put both portals in the low area, jump in, and do the yo-yo thing between them. when your on the high point nearest the glass, you can shoot the exit over it. though you've probably already figured it by now.

Not bad. Takes longer to load than most flash games but I'd say it's worth it.

Pros:

• As long as it takes to download this it's nothing compared to downloading the official version
• Sound effects taken from Portal
• Puzzles aren't too difficult
• Elements of game realistically reconstructed
• The cake is NOT a lie
• No companion cube

Cons:

• Aiming is harder especially when trying to create a portal on a surface at a small angle
• You seem to die when caught between holes
• Wierd controls over cubes and making sure they land on the right place
• Sometimes hard to enter portals

1. Place a portal on the lower level floor where you start off and one above the entrance on wall.
2. Jump through floor portal and you should have enough speed to get to the floor between the 1st pit and the blue shock field.
3. Recycle floor portal to create another on the floor below you and jump in trying to stay on the entrance level.
4. Recycle entrance wall portal and create a 4th on the lower level floor where the 1st portal was.
5. When the blue shock field is about to switch off, jump off entrance level and into 4th portal and out of 3rd portal with enough height to run past shock field, jump across 2nd pit and exit.