Great game. Looks good, feels good to play. Nice and smart puzzles.
Two complaints, though. The sloped buttons are difficult to jump on because of that weird angle. I guess they are sloped so that the magnet would slide off once it had pressed the button, but that doesn't mean that the player character has to interact with the button in the same way.
You could make it so that the player character doesn't even collide with the button and they just have to drive over the button hitbox to trigger it. The game would flow much better like that. Of course if the player doesn't want to trigger the button, they can just jump over the hitbox. Easy peasy.
Also, you should be able to aim and throw the magnet while moving. The game would flow way better like that.
Cheers.