If you meant you’re looking for a ROM hack that already does these things, check out or “SMB Special Improved” hacks on ROMhacking.net – though none are officially named “BETTER,” there are a few fan fixes floating around.
Due to the hardware limitations of the PC-88 compared to the Famicom, the game introduced several distinct changes to the core Mario experience:
This isn't just a straight copy of the NES cartridge. Hudson Soft developed this for Japanese home computers (PC-88 and Sharp X1), and because they couldn't perfectly replicate the NES hardware, they got creative.