here's one bug found: When you don't know the code for the black door, there is no way to close the password window (or i'm just blind) and have to refresh browser to get out and have to start a new game.
I don't know if it's deliberate or not but when you run towards a door for a while with the original clone and then go press the button to open it, the clones don't stop where the door was and just run past it (often to the goal)
