The magnetic mechanic is super unique, and you've made some creative puzzles with it. It was quite fun pushing objects around and jumping about once I got the hang of the attract and repel mechanic. The graphics are also nicely done and they fit the lab aesthetic pretty well.
You definitely need to add a tutorial that explains the attract/repel mechanic and how to maneuver with it. I had to look at the video to figure out how to beat the first level. I'd suggest adding even easier levels with some text that explains how to lift yourself up with the magnets. You should also add a restart button. I got trapped at the third level and had to reset the game. The jumping is also a little inconsistent - sometimes I'd jump and barely make it onto a ledge, then I'd try again and I'd make it on.
Overall though, it's a very unique take on the theme with great puzzles. I had fun playing through all of them and would've enjoyed seeing more levels. Great work!