Really nice game! I spent way more time with it than I care to admit, because I really wanted to finish it (it just kept me going) and the soothing background music did its part to help :) .
Sometimes the limited view (not the lighting, because that was adjustable with the player size) was a bit frustrating. Maybe that is something to explore? Changing the range of the camera view with the player size as well? Also, there might be some room to get more out of the mechanic if the jump distances would me more severely punished with size.
Great effort, loved the experience!