OK, this is, without a doubt in my mind, THE BEST GameBoy game ever made (and probably will be for a long time). Even though I wasn't old enough when this game first came out to get nostalgic about it now, I still love the game. First of all, you start out with the ORIGINAL Super Mario Bros. game! That alone makes a great game. But in gets better. After you beat the classic game, you get another challenge, the original game, but harder (called star levels). The enemies are faster and easy ones are replaced with harder ones. But no, the geniuses at Nintendo didn't stop there. After you get a score of 300,000 you get to play "Super Mario Bros. for Super Players." This is actually the Japanese SMB 2, which was never released in the US until now. And there is TONS of other stuff to do as well: 2-player, challenges, and all the while earning extra features. This game also has the ultimate replay value. I've had it for six months I think and still play it 5 out of the 7 days of the week. This is a must have for any Mario or GameBoy freak (heck, who am I kidding, this is a must have for anyone with a pulse)!