Pretty cool! I wish it had audio, a lot of neat opportunities for it I think? LOVED how you could see the light shine off different surfaces! I didn't get stuck on getting out of the computer but some might, you could try explaining that better or at least not using the Esc. key, someone might think that exits the game? I like how some people respond differently depending on what you did :-)
P.S. Maybe add a retry button if the player fails instead of just game over?