I had the same problem : wouldn't play in FF or IE : it would instantly teleport me against the left or right wall - end the end song would be playing right away - I'm sure it's not a computer speed issue ( I have a Quad Core / Vista / GeForce 8800 GTX ) but there might be something to test with Flash Player version

I downloaded the game, and it worked fine : it's really fun, I agree with Blink ; you are bound to turn this into a real game now
It reminded me the Portal ending, in the tongue in cheek fashion...

Cheers, you have achieved something that is very likely going to be extremely viral!