You go around an empty world to look at spirits and get lost for hours. Flight is limited by an extremely small meter, and the actual flying and movement is heavy and delayed. Not good for a game about flight. There's also an enemy who takes away your flight meter's levels, and, should you actually explore, you can be trapped in certain areas forever. Also, 90% of the playerbase is overseas, so, the messages function (paper boats in the hubs) is only for them, since there's a language barrier.