After seven years of development, Super Mario Bros. has been ported from the Nintendo Entertainment System (NES) to the Commodore 64. Developer ZeroPaige has released the port as a C64 disk image file that can be used directly on the. Commodore 64 console or through C64 emulators. Some issues have been reported such as minor lag at times, music running a faster than the game, fireballs not traversing screens, or jumping suddenly no longer working. BleepingComputer has reached out to. find out if they have been contacted by Nintendo regarding this release.
Source: https://www.bleepingcomputer.com/news/gaming/nintendo-super-mario-bros-now-playable-on-commodore-64/