Super Mario Brothers Deluxe is an exact copy of the original Nintendo game.  All the same graphics, levels, and even cheats are the same.  Even if you beat the original game, this version has a few things added.  There's a mode where you race a friend or the computer, a table which has  all the Toads that you've unlocked which will let you print out banners and  such on the game boy printer, a fortune teller where if you are very lucky  you earn five extra lives, and a challenge mode where you have to have a  high score, gain red coins and find a yoshi's egg.  There is also a picture  gallery similar to Zelda Dx. which has pictures of enemies and scenes from  the game.  This game is pure fun.