In the Atari Age forums, user Sprybug has posted screenshots of a working version of Super Mario Bros. made for the Atari 2600. Comes with 16 levels and everything you'd expect out of the game. This isn't the first time a game has made it to the Atari: Halo was also ported to the old-school platform a little while ago.

It is now 32k. With 32k I believe I'll be able to fit 16 levels (World 1-1 through 4-4). Each end world will have a Koopa kid as the boss. For those that played the pre-demo version, you already know that it's not exactly like SMB, but it is pretty close. You automatically get what's in the bonus yellow blocks. The flagpole is also smaller and I did this because I wanted to be able to put it in strategic areas not on ground level in order for you to have to figure out how to get there to finish a level. I also changed the program so it only has one enemy on the screen at one time. I did this because it was proving too difficult with limited cycles and RAM to keep swapping and keeping track of stuff. However one is popping up all the time, so it might seem like there's more than one at one time! There is one exception. When you kick the turtle shell, it'll turn into a moving playfield block which allows for an enemy sprite to come on so you have the ability to knock the shell into something besides a brick. I wanted that to at least stay true to the real game.