Super Mario Galaxy 2 does everything that a sequel should in theory do, and it aces every step. The mechanics have been slightly improved upon and now there are even more mechanics. New abilities and the like. There are many more levels to play and stars to gather. The music in this one is glorious as well, and we see the return of that loveable dinosaur Yoshi, complete with new mechanics for him. 'Tis fantastic and worth your time. Yet another due for a full replay. It has been quite some time.