According to ESRB, this game contains: Mild comic mischief
Parents should not hesitate to allow their kids to play New Super Mario Brothers. It drips so much sweetness it cases cavities.
Platform gamers, this one's for you. You've been waiting a long time for it, and there's not much else out there right now.
Old School gamers will definitely appreciate the game design and nods to the rest of the series.
Casual and Non-gamers can easily get into it. It's as simple as when you got your grandmother to pick up a controller back in 1985.
Deaf and Hard of Hearing gamers should note that, while there is no spoken dialogue, there are some audio cues such as timers and switches. Overall, though, they should not have too much trouble.