I quite like this goofy little mushroom guy! The animations are bouncy and cute.
I'm not sure if you used a rotation tool to make parts of the animations, but if so be careful: programs not designed for pixel art can add subtle uses of anti-aliasing and increase your color count by a fair bit. It's not super noticeable as just a piece of art, but as an asset, often you want to recolor pixel colors in a shader, and all of these extra whites/blacks can be a real headache.
I didn't even notice it until I opened it in Aseprite: