What's that? "Working?" Hmmm... well if you think about it, Galaxy works just as well as World, Land, and much better than Sunshine. If Super Mario 128 is what you're thinking, that's become the name of experiments and stuff... There won't be a game by the title (as far as we know today).
Yes, the Galaxy box is pretty awesome. Very loudly does it shout, "MARIO GAME!!" A fine decision to bring back "MARIO." Looking back, Sunshine's box was so dull...