Unfortunately this game was already shut down by the time I tried to play it, but maybe I should say fortunately. Reddit tells me it took almost 300 missions to even get to the title screen in game.
It was a mobile game. It was a gacha game. It was meant to be grindy, to waste your time, and try and encourage you to spend money.
Now all that being said, people do still love the story, and I must admit it was fun to see the world before the keyblade war and understand why it happened. In my opinion though, they still left a few holes that made me feel pretty lost, and like watching six hours of cutscenes on youtube might have been a BIT of a waste of time.
I do wish square would create a movie for it so at least we could have that and people wouldn't have to go download a dead app so they can view the cutscenes in a theater mode.