This is a great game, with beautiful graphics and smooth gameplay. My only complaint is that the story is fairly short. You can replay each level, to achieve a unique challenge for each level (such as score, remaining lives) to unlock some extras, but the game is still a spare time waster rather than committed play time. As this is a 3DS game, I have to add that the 3d effect is well done.
Final thoughts, it's a great game and for a lower price it's well worth it.