An article in Nintendo Power provides yet more images of New Super Mario Bros. as well as confirming the game will have no fewer than 80 levels. By comparison, according to Wikipedia, SMB had 32 levels, SMB3 had 90 levels, and Super Mario World had 72 (not 96 as some think, that number includes multiple exits). The game will also features the minigames from Super Mario 64 DS, with the possibility of new ones. If you really want to see every single pixel of this game you can before its release in May, by all means head over to the link.

Source: Joystiq