Hello!
For some reason the game's servers were shut down, and the game removed from the play store. Trying to access the game would result in an endless loading. The developper's website is down, and they disappeared without a trace.
Nobody knows why this happened. But there is a chinese version of the game with servers still online that you can download here.
Let's hope we can hear back from you, and you tell us what happened!
Have a good day!