Good, but HARD!
The graphics and style were very faithful to the original Mario series, and the bright colors worked well. It was just sort of too hard! I didn't know where to go (though it was fun to kill the bad guys) not to mention that boss on the first level is unbeatable! I tried throwing eggs, but I couldn't get a hold of it! When I was "finally" able to get the finishing blow, the boss hit me too so I lost!
Still pretty playable, though.