That was fun! I really like the art style, the 3D character in the retro pixel art environment is a unique combo I haven't seen very often.
Gameplay get monotonous after a while, partly because there are so many items to collect before you progress, and partly because there are no enemies or obstacles to get in your way. Still, I had a lot of fun doing the berry and diamond level -- just couldn't do 96 mushrooms :P