Check in game settings. It sounds to me, the game is coded to be "dark". When you pull down the notification shade, the system settings take over and brightens the screen. Same thing happens when you press the home button.
So check settings to see if in game brightness can be changed. If not, turn screen brightness all the way up via display settings or slider bar in notification shade if present.
I would also encourage you to provide feedback back to the game developers. You can do this by visiting the app in the Google Play Store and look for the email/contact option.
08-15-2016 03:16 AM