I see this version has no run button. I've played the original version and that fact absolutely kills it.
Yeah, I've played Doki Doki Panic as well (sometime around version 6.0, NESter DC added the feature to play Famicom Disc System games -- you just also needed a system image), and, yeah, the play control makes that game just about downright bad. Of all the changes that were made from Doki Doki Panic to the final version of SMB2, that one must be the most significant.