So today I went to a used game store and saw this Factor 5 game system for $20, which runs Factor 5 games and classic NES titles. Let me say now that I've never played NES games before, especially since my first console was a Playstation 1. I was like, "Sweet, sounds like a good deal," especially since all the actual NES systems they had were $35. The game cartridge they gave me with Factor 5 original games like "Bomb Kid" worked well, though a couple of the games are pretty awful. However, the Super Mario Bros./Duck Hunt cartridge I bought separately won't let me scroll down to two-player gameplay for Mario nor does it seem to save high scores. Keep in mind I've never played Super Mario Bros. outside of flash simulations online, so I don't know if the high score is supposed to be saved or not after you turn off or reset the console. Regardless, the picture is a bit buggy and not being able to play two-player is irking me. Is it that the Factor 5 system isn't fully compatible with NES games or could the Super Mario Bros./Duck Hunt cartridge be bugged? Also, while I was there I noticed other consoles for higher prices with more versatility in the games they ran, with the most expensive running Factor 5, NES, SNES and Sega Genesis games. I forget the name of that one, but does anyone know if similar problems exist on that system as with this one, in terms of its full compatibility with the older games?