I have to agree with everyone else, its not a good game.
The 3D is cool because it changes how the game LOOKS with backgrounds going back.
The gameplay is just too simple now to keep my interest, at least the wiiware game had multiplayer and new maps and levels that transform. This is generic.
SAVE YOUR COINS !!!
It might be worth it if you could share levels between 3DS friends, or leader boards but NOPE its bare bones.