Two years ago, I released an EP containing 3 variations of the same song, made on 3 different systems: SNES, Sega Genesis and FM Towns. And just like Neo Kawai, which came out way after, I released this EP on itch.io too:

https://rayhamilton.itch.io/the-marty-trinity

Here is also the bandcamp link of my EP: https://rayhamilton.bandcamp.com/album/the-marty-trinity