I think my device is just not compatible. I can't get rid of the shadows. I erased all game data and restarted the game but still nothing changed. I'm playing on a Samsung Galaxy TAB A. And it's very old too.
like how old and if you can type on it then its still good on playing some games. If your device is messing up pls “hold power + down volume button” it will turn your device off then on and see if that works :) -prorichard