I'm playing through at the moment, and as far as bugs go at least, one I see coming up is in the level Electro Magnet. During it, when you jump from being pulled with the magnet to the level's end, if you position yourself to be pulled on the edge and leave the beam with the magnet, landing on the top, the magnet will still want to finish its pull to the electro magnet, making it unable to be taken more than two tiles towards the door. In this particular level it isn't an issue, but were it to be used as a movement tool, it would be shut down because of it not checking if it should finish that pull. Setting the magnet down also does not stop its (unintended) tether.