I love the world you have created with this game. Fantastic art. The opening cutscene was incredibly impressive. It looks like traditional animation and if so, bravo (well, bravo either way because it looks great). The character model is also very well done. Small thing, but I quite like your control scheme with ball mode on F and jump on space. The speed of ball mode is a joy.
I think the camera in this game still needs a bit of work. Maybe some smoothing with how it moves. It also clips through the bottom of the map sometimes. I also think the controls in ball mode could be a bit more responsive.
I wasn't able to get past the mushroom that you feed. I don't know if I missed anything or if this is a bug.
Overall, great work.