PC version Fans have made a PC version. Some are still early, so read the project page first.
Fans took Super Mario Bros. Remastered apart and rebuilt it so it runs natively on a computer, often with widescreen, higher frame rates and mods. Here is the project we know about:
A Remake / Celebration of the original 'Super Mario Bros.' games. Features new levels, custom modes, new characters, alongside a full level editor / custom level system!