There is a single player and 2 player mode (requires next to another player another 3DS console) and the "Münzrausch".
The graph I find it very successful. New Super Mario Bros is a great game. Because it combines the classic Mario elements with new ideas (enemies, items, worlds)
The biggest change, however, is here the Münzrauschmodus. You have to collect as many coins as possible.
Within a period of time three randomly chosen levels have played out, while as many coins as possible are collected, the corresponding record is stored in the system and compared with active StreetPass with other players or friends.
The high score is here therefore at the center.
Our girls play this game very much - nice pastime