Smooth and sweet, yet far too short.
Graphics: 7/10
They're pretty nice. They're smooth and 3d-looking yet in 2d. Backgrounds are nice and detailed. You'll recognise most of the enemies and pretty much everything from old games, though I don't consider this a bad thing.
Sound: 8/10
Sound is excellent. Plenty of voice quotes and not at all tinny sound effects.
Gameplay: 7/10
The game is well executed, yet far too short-lived. The game consists of about 8 different islands, though if you're an experienced platformer, you'll likely fly through most of these levels far too quickly. Most of the bosses are pretty much identical, which gets a little bit boring after a while. There is about 4 different powerups (the fire flower, the giant mushroom, the small mushroom and the shell) however you will very rarely get 3 of the 4 and pretty much always be getting the fire flower. Powerups like the shell and super mushroom can be really fun, however they are so rarely seen that it feels more like you're only playing with one set of powerups.
Value: 8/10
Don't get me wrong though. This game is still an excellent platformer. My only major complaint with its formula is that it was way too short. Unlike something like super mario for snes, you'll find yourself very rarely repeating levels if you like platfomers and find that the game is surprisingly short and doesn't leave very many interesting bonuses (such as star road for snes super mario).
This game is still worth playing though since its an overall good platformer if you can put up with it ending a bit sooner than you would've hoped.