Fun and challenging. Really great art style too. Minor suggestions:
I didn't have time to beat it. I'd make some of the collision detections around enemies smaller. I noticed on some of the enemies I was close to them but not exactly on them or touching them and it'd activate an impact. Example would be the hands reaching up on level 3. Id maybe tweak the acceleration on the player movement too. Sometimes I'd be lining up a jump and a gentle tap would put the player quickly up to or right off the edge. It could also be that I was playing on a phone.
You did a good job and it was fun!!