Really cool game, left me scratching my head a couple of times.
Viewing post in Invert the Inversion jam comments
It might have been something that I missed, but it was on the level where you had to invert twice to be able to press the switch, maybe the second to last one, and for some reason I didn't realize that, so I kept trying to figure it out a way to touch all the circles on the level before returning to the switch.