A Super Mario Bros Hack by Daveyrootbeer, based on the Comic Johnny the Homicidal Maniac by Jhonen Vasquez.
Aside from changed graphics, the player can shoot projectiles horizontally.
Super Mario Bros.(Japan, USA).nes
(No-Intro version 20130731-235630)
File SHA-1: EA343F4E445A9050D4B4FBAC2C77D0693B1D0922
ROM SHA-1: FACEE9C577A5262DBE33AC4930BB0B58C8C037F7