The visuals are lovely... Animating in pixel art while making it looks pretty can be tricky and you've nailed it! I had a hard time doing wall jumps, but that might just be me. Well done, especially for a one-person-band!
Thank you for your comment! About the wall jumps, I started with an input model more intuitive, but changed the conditions to make it easier and may have ended up doing the opposite, definitely a something to check in the future!
I had trouble with wall jumps too. It seems to randomly work half of the time. I wasn't able to pass through the shaft on the 3rd screen despite trying for 10 minutes.
The graphics are good, though. Especially the character.
