Please take a look in my game!

Hello everybody,
I have released a game named Bouncing Bird.

I use App Analytics from Apple iTunes Connect and I realize that my retention rate is: 0%, and download is 20% of store view.
So today, I create a topic here and hope somebody please take a look in my game and leave me a comment on what’s wrong with my game!
Is the gameplay too bad (That makes retention rate is 0%)? Or the graphics is not good enough (download rate 20%)?

Thank you very much!

Sorry for my bad English! :slight_smile: