Super Mario Bros.

About

Doppelganger's NES disassembly, kept at Xkeeper0/smb1, reassembled with every tile and palette redrawn; it runs on EmulatorJS's FCEUmm core with nothing to bring.

A side scrolling 2D platformer and first entry in the Super Mario franchise, Super Mario Bros. follows Italian plumber Mario as he treks across many levels of platforming challenges featuring hostile enemies to rescue Princess Peach from the evil king Bowser.

Description from IGDB.

How it runs

Project

smb1Decompilation. The original binary turned back into source code, function by function.By doppelganger and Xkeeper

Port

andrewnakas.github.ioBy Andrew Nakas · WebAssembly, on the FCEUmm emulatorOnline since Oct 4, 2026Source: andrewnakas/smb-cleanroom

Controls

Arrows move, X jumps (A), Z runs or fires (B), Enter is Start, Shift is Select.

Plays with

Keyboard, gamepad and touch. Saves in your browser.

You need

Nothing to bring: the port loads everything it needs.

Original

Nintendo R&D4, 1985, NES