That was really fun! The periodic extra jump was predictable and fun to work around, and the levels, while a bit difficult for a jam game, were quite fair (or maybe I'm just too good at these sorts of wacky platformers?). The art and character designs are cute!
While the instability was predictable, there could've been more indication to it than only the green bar in the top-left corner. Maybe a subtle aura around the player character? Perhaps an audio cue? (An audio cue that's subtle, or it would get annoying quickly).
I could not read the first intro cinematic in the time it was on-screen. Pressing a button to advance it might be more convenient.
The songs are really cool! They encapsulate the game's goofy dystopian vibe. Although, the audio is a little bit loud; the music and sound in combination regularly peak above +0.0 dB.
Also, while the level design was, all-in-all, pretty good, there was a leap of faith in the final level.
Fantastic! Great work!