Wow, everything from the beautifully dithered background to the exquisite color pallet and lively animation. 10/10. Great work Mr Hk

First, love zombies. Second, this animation is great!. Very smooth. If it was extended would be cool to have a trip here and there. 

Only issue I saw is when the left leg hits the ground there are a few brighter pixels that show up around the ankle and near the top of the left leg.  They seemed out of place. 

As others have said I love muted color pallet and flowy feel of the tree bark (and even stones). I only wish the tree leafs were as stylized as the bark. A beautiful piece. 

I really like your use of color pallet here. The only thing I would suggest is possibly playing with dither shading on the planet surface (unless you weren't doing that for stylistic reasons).  Great work. :)