I think it’s a cool idea. Not just because I like freeware games developed by random internet people, but because it seems to me you’ve made this game your own; you’ve chosen it out of all NES games to be your favorite, even though it is, based on how much I’ve heard of it, an obscure title. This makes you one of the few wholly capable of making a true spiritual successor to it. And even if you don’t finish it, I imagine it would be a fun project to work on.