good ,but it's the first mario that don't deserves to be called new
the second super mario bros. changed completely the style
the third was the first game that lets you chose the levels you want to play
super mario world was the first one in introducing secret levels(not only secret ways to skip levels)
etc.
every super mario game has introduced new concepts. it's a little bit disappointing to see that this game only takes references of the old mario games and never introduces important changes to the gameplay.
every old-school super mario was fun,challenging and innovative, this game only respects the fun. this brings us to another point the game is too easy. if they do a second part y hope they introduce real "new" concepts.
every time I play this game I start to remember the old mario games and want to turn of the ds and play super mario all stars or super mario world on the super nintendo.