I enjoy playing this game, but I am becoming increasingly frustrated when, after several successful attempts, I am faced with a black screen when opening the app to play.Only after deleting and reinstalling the app am I able to continue playing. (I have not lost my credit $sss). This fault is not chronic, but I have had to reinstall the app on at least ten occasions over the past week. Is anybody else experience the same problem? User's recommendation: Be advised of this fault.