The original Super-Mario Brothers in all it's pure originality. Add to that new gameplay modes and the toybox, Amazing!
The Sound and graphics are just as you remember them on your old NES or SNES. And I wouldn't have it any other way!
The Value? Well, besides getting the best game ever on your handheld system, you also get new gameplay modes and challenges. As well as the Toybox. The Toybox isn't great, but it has some interesting things to it, and can rid you of boredom if you ever get tired of playing the actual game.
If you own a Game Boy Color or GBA, then you must buy this great game. If you don't may Bowser's flames be at your feet and Mario's feet on your head.