This one feels much nicer to play!
A few thoughts!
You cant skip loading into a level if you accidentally open it in the hub maybe instead of pipes that the magnet goes into it could be an magnet block that your magnet sticks to, then you could change polarity to close the level entry again.
You can't finish a finished level again (at least for the first level)(Maybe it could be ghost keys like mario ghost stars so you can at least replay the level?)
I'd love to be able to call the magnet home a bit. Maybe that would just be a wider area that you can call the magnet from?
Would prefer to be able to move and throw the magnet at the same time for a higher skill ceiling. Although, I know that'd come with more platform-y gameplay.
On the hub world, in order to get to the next level quickly i'd naturally hold right immediately, which would result in me having to backtrack to pick up the magnet. Perhaps it should spawn further in front, or you could just stop the player moving before the whole hub world is visible
Lastly, a question, is there a reason you can't change the magnet's polarity until you pick it up for the first time?
Thanks Mark!