Romacher Kaze Emanuar has just re-created Super Mario Bros by hacking Mario 64. This looks absolutely awesome and seems to be a 2.5D re-creation of the original. The patch is available for download and both a trailer and instructions on how to pacth the ROM are below.
Link to ROM patch: https://mega.nz/#!KHZ1FSbY!A6C_MTKDRPgEboREBI2juRVoSDuXxunUMdr5RN_291U