Hi. I, too, am stuck on onEscapee, in the city. I've found the big door that is presumably the exit, and I've found and tripped the eight switches which activate the code lock one screen back from the door. What I haven't managed to find is the door code itself. The only code I've managed to find is the one for the Magical Disappearing Bridge, which I tried just in case but which didn't work. If someone could show me where to find the code, I'd be grateful.
I did find what looks like a partial code at the first intersection you come to when you head back from the door, but I can't seem to fit the code symbols to the picture. I've had a few guesses, but none have worked. Given that there are 27000 combinations, I don't feel like fiddling with the thing for much longer.