It would be great to have the rest of the levels, but from a legal point it might not be wise to do so.
I think at the moment you're less likely to get a C&D from Nintendo by just having one level, and more likely to get a C&D if you had the whole game assets recreated.
You can't really remake the whole game with the assets from just one level.
P.S: They're amazing by the way, great work.