[Sugam]

I was watching this earlier, that's pretty cool of you. I recall AGDQ doing this one year, I think with SMB. Nonetheless...

SMB is not a very good game to try with because the games design counteracts the program every way possible
When mario falls off the screen in a pit he continues to move in the same direction and same momentum fooling the program into thinking that its making progress.

Another problem is keeping the display on reduces the game speed significantly when the brain gets too large.