Retro, but Professionally Polished!
While there are a few trivial things that I could nit-pick at with the animation, the whole animation is extremely fluid & polished.
While the Gameboy grayscale color pallet isn't for everybody (since Kirby's debut was on the original gameboy back in 1991 / 92), it's one family friendly animation that everybody can enjoy.
I just hope that the author will consider making the leap to color in the future with the NES sprites... just to please the "color critics".