Really nice gameplay! The graphics kind of remind me of Pokemon :)
It was a little confusing at first (at least for me) because I thought the magnet buttons were meant to be clicked instead of interacted with "E". Other than that it is a matter of getting used to it :), It gets really fun once you learn how to play.
I have to mention though, in the shop, you can buy the upgrades even when you don't have enough money (at least it appears to)
PS: I really liked that nice effect you added to the scrap pieces on top of the player when you're gathering