Well the animation looks good. It looks like he's walking just like a person would. Artwork is good. However, with his legs moving as fast as they are, his body should be traveling at a higher speed since people don't typically walk that fast. His feet slide against the ground rather than grip it under his shoes, enabling him to move forward. Kinda like the hover boots in Zelda Oot.
Other than that, it's looking good, dude!