With inventive level design, rock-solid controls, an emotional backstory for Rosalina, and a soundtrack for the ages, Super Mario Galaxy is a real treat. My only complaint is the Comet missions. For a game with so many surprises, it's a little disappointing these challenges are often uninspired (beat this boss with one hit point, finish a three-minute level in five minutes, etc). Still, this is an amazing game and well worth any gamer's time.