Very well-done graphic! My only "criticism" (if you can even call it that) is that it doesn't look like it's walking. I say it's not really a criticism because it looks like it's doing a little dance, and it's amazing.
Looks, as Eric said, like it should be a worldmap scenery. It's really good, but it needs to be directional IMO to be useful in a level. Also, isn't the one already included in SMBX SMB3?