Really liked it overall. I liked the feel of the character and I found the double door really satisfying. Can't wait for the sound design! Just got a few little critiques:
Restarting the level.
Wasn't sure if I had to press CTRL or hold it It became obvious eventually but maybe a lil animation that shows you must hold it down could be cool.
Aiming the Magnet.
While aiming the magnet and changing the polarity, the trajectory resets. Would be nice if the trajectory of the throw stays the same, while also being able to change between polarities. Also being able to move while aiming the magnet would be nice.
Bug
Found a bug, while you're in either the hub or the "Thanks for playing" level. If you hold down CTRL the restart symbol appears, top left, and just keeps growing until you let go of CTRL. Not really major but just letting you know.
Hope this helps you in anyway! Really excited to see how your game develops. It's so cool to watch the development of it!