Super Mario Bros: The Early Years is a game loosely inspired by the original Super Mario Bros, but set when Mario and the gang are pre-teens. The hack includes 40 levels spread across 9 themed worlds, custom music, original hand-drawn graphics for most sprites and backgrounds, and difficulty similar to a real Mario game.
Super Mario World (USA).sfc
CRC-32: B19ED489
SHA-1: 6B47BB75D16514B6A476AA0C73A683A2A4C18765