I've played this game like 3+ times and it's still a fucking mediocre ass 2D platformer, despite being probably Mario's best 2D platformer purely form a level design perspective, it's only real competition being Super Mario World. Play just about any other 2D platformer you can get, and if you really want a multiplayer 2D platformer so badly, just play Rayman Origins or Legends. Both are leagues above anything the NSMB series has produced.