The Super Mario Bros. platformer never came out on an Atari console… until now. The video at the top of this post shows a demo made by an Atari Age forum member with his interpretation of what the seminal platform game would look like on an Atari system. The demo features world 1-1 and it looks absolutely awful, but then again, the Nintendo Entertainment System was the first console I owned.
Those interested in actually playing this version of the game, please visit the Atari Age forums where creator SpryBug explains what he wants to do next with this demake.
Source: Atari Age