That was a fun, hard little “inverted platformer”!
I had fun trying to speedrun the levels - thanks for including a timer!
There was a weird bug with collisions sometimes, when right next to a jumpable platform it would get stuck (normal and inverted) and I had to make space (often too late, damn guards being good at their jobs!) before being able to jump over.
All in all, nice work! The puzzles and levels were fun to traverse!