I just played a few minutes of the game, and it's fun. It's polished, looks great, and I love the various sounds that hearten back to the NES days.
One thing that didn't work, however, was the App Store notification that the game was available. Before this morning, there was a "Notify" button in the store that, when tapped, would tell you you'd get notified when the game was out. But I never got one—and I'm not the only one, apparently.