Interesting concept. I didn't try playing this with someone else, so I don't think I got the intended experience. I will say it's a good use of the theme. But, the opening walk to join the magnets was a bit long and boring. The platforming was also very awkward since you're not able to adjust yourself when in the air and the acceleration is hard to judge at times.
One suggestion I have is maybe levels where you start off as separated and must get together to be able to make it over long gaps or over obstacles you couldn't do alone.
Very cute game and has a lot of potential.