This was a neat little puzzle game. You did acknowledge in the description that the jump button is “finnicky”, so I won’t harp on it too much. I will point out, however, that there were times where i tried to jump and could not, but also times where i should not have been able to jump but could, which meant that most of the puzzles could be cheesed by just, jumping inside of a wall or in midair.
Playing in fullscreen is NOT a good idea, as if you do then there is this weird white rectangle that covers up the playfield and makes it impossible to see what you are doing. This might be related to the fact that my display is 4480×2520, but accounting for large monitors is a part of making games for PC.
I’ll note also that, because you used the default Unity movement system, players with gamepads can move their character with left-stick. Mapping jump, multiply, and transfer to face buttons would have been a nice accommodation feature.