This was a super interesting and fun take on the theme. I found it really difficult to figure out how the movement worked at first, so a more in depth tutorial would have been really useful. Once I figured it out though, I was able to get all the way through to the end. I ran into a few issues with magnets disappearing off the screen and also accidentally dropping the crates off of the platform I needed it on and having trouble getting it back up. I think adding a restart level button would have been really helpful in those cases.
All in all a great game and I had a lot of fun in the last room just messing around with the magnet mechanic! I would definitely play a polished full version of this game!