Very cute graphics and music! The presentation was fun as well.
I really like parallax backgrounds, they worked well here.
However, my input detection for jumping wasn't firing for what felt like half of the time, so I wasn't able to get past the first major platforming challenge. Maybe it's because the input detection is being polled in the physics update instead of the regular update? At least that's my guess.
But I liked this overall, good job :)