In this hack, you play as an old man who throws fireballs out of his head. The hack is pretty short : Only two levels. The other worlds just have a level which has the same level-design as the second level. It has some ASM changes for the enemies and some graphical changes.
Super Mario Bros. (World).nes - NOINTRO
CRC32: 3337EC46
MD5: 811B027EAF99C2DEF7B933C5208636DE
SHA-1: EA343F4E445A9050D4B4FBAC2C77D0693B1D0922
SHA-256: F61548FDF1670CFFEFCC4F0B7BDCDD9EABA0C226E3B74F8666071496988248DE