EDIT: Yes finally got around to update this. That link is now updated to 1.4.2
This is a short gameplay video of Super Mario Bros. on Sega Genesis, ported with a from-scratch converter to "translate" 6502 ASM to M68k ASM code. This video isn't meant to be a showcase of skill. As you can see, it's practically picture perfect in visuals and play. The sound takes advantage of the Genesis sound hardware with good results. You can download the game for use on an emulator and read all about the technical stuff in this amazing conversion here:
Note: The only reason I captured the emulator window is to help prove that this is in fact played on a Genesis, not the original NES. At the end of the video you'll see that I reset the game after the Minus World glitch fails. It's not a separate video inside a Windows frame. Try the game out and see for yourself by clicking the link!