Very cool concept. It's a bit frustrating not being able to move while on the floor. However, since your game is focused on the movement mechanic, it may not be a bad idea to lean fully into that. Remove the sprite's legs, make it so you can only move by jumping around and build levels around that. You have a couple of tight corridors that don't work at all with your movement - but if you add a few more walls to use your bounce pads on and suddenly the corridor becomes a fun challenge for the player. Of course, you can make it have more traditional platformer controls, being able to move in the floor - you choose what you find more interesting!
What I'd love would be for you to add a "Reset level" button - I got stuck on the button quite often and, while I get that there may be bugs, having to restart the whole game gets annoying. Luckily you added a very functional save system so I never lost more progress than a single level! So that's a very positive point.
Good job! I enjoyed it a lot.