Like the visual aesthetics of your game. You found a great, minimalistic style that looks, combined with the parallax effect and bluring, really good. Also the animations of your main character are great, one can see you put a lot of care into these. There is a foreground layer with one solid color as well, which is adding a nice layer of depth.
The only element I think would benefit from more details is the actutal playground. Presenting it mostly in one solid color with some gradient is too minimalistic in my eyes.
The overall style reminds me so much on what this great dude is teaching. Maybe you know him already, if not, there might be some inspirational thoughts in his videos, I loved to watch every one of these, and learned a ton of new stuff.