Super level design. Took me 3 or 4 sessions to beat the game. The upgrades feel so organic and useful! I'm not sure if I was solving puzzles correctly or if I was brute forcing them or cheating. I got confused at a lot of points but that was mostly part of the experience.
The main criticism I have is the sound. The jump sound clips every time. At least in the web build. And the music loop wore thin pretty fast. Having the music come in and out, or only play in certain areas, would have been nicer. But everything else felt good.
I would also like to highlight that I would never have beaten this game if it didn't save progress. It's not a rare feature but thanks for including that anyway.