One of the first things I tried was seeing if the wire was infinitely long. It seems to be. And then I saw that there were question marks emanating from levels 11 and 12, and they are a darker color than the other levels when completed (as well as 14, but I attribute that one to being the last level of the demo).
It wasn't too difficult to discover "breaking the game" by wrapping around the rotation gear in level 11 a few times. What about level 12 though?
Is there some secret wall that you can walk through? Can you clip the character past the wire spool and get stuck behind it? I also considered getting caught and undoing into a position where you're still caught but as far as I know that would just prompt an undo to the next valid previous point.