my immediate first instinct was to reassign the right mouse button to be the polarity toggle.
unfortunately this clashes with the aim mode toggle, which can't be unassigned from the right mouse button
the jump feels a bit too short for me personally.
in the fourth level in particular it can be a bit tricky to jump from the moving platform to the platform where the magnet spawns if you don't have enough momentum, and it is a bit clunky to climb up the ladder on the right side of that level.
(i recognize that you don't actually have to climb that ladder to finish the puzzle, but i still climbed up several times before i found the correct solution)
i like the puzzle designs themselves. every level took me a few attempts to solve, but none of them were impossible.
although it does feel a bit too easy to get softlocked.