This was fun! There's a lot of "inverse color platform" games, but this specific implementation of it reminds me a lot of SHIFT. I especially liked the use of 3D in this!
The art is great: simple, cute, and functional. I LOVE the background change between switches. It makes platforming much more readable!
The first platforming section in the purple world is so clever. The same-looking platforms, but with two different jumps, being entirely contextual. That giant eye is so creepy...
The talking sound is a bit piercing compared to the other sounds.
I can't seem to run + jump while running left. I can't tell if this is a problem with my keyboard or the controls code.
Great work! Fantastic!