Glad to hear that more artwork is coming. I hope this will increase the interest in dumping more G&W roms.
About the new ones posted, why haven't you reused the Super Mario Bros design for the other two? I would prefer the same design for all games, but it's a great work anyway. Nice addition the animated buttons too.
Would be nice to have a pinned post with the whole G&W art. In this one is less visible.