Thank you for taking your time to answer me.And yes I've already tried uniinstalling and reinstalling again.But still,no luck yet.Got no idea why it is happening.And I am trying to play it on Samsung J5 Prime.I know it's a bit old but can't help with that.Maybe I think I should try to update my phone version.Currently,it's android version is 6.0.1.But the problem with that is the storage space is too limited to update the android version.So,I'll just wait to buy a new phone or try to get around it with my current phone.You may have to uninstall then reinstall the latest version. I had an issue a while ago whereby it wouldn't install app over 1.5Gb in size. Got around it by uninstalling old version, installing an earlier version, i think it was v22 then installing updates till v46 then did full installs from that point onwards. No screen issues for me. BTW I play on an Samsung Galaxy A6 Tablet running latest version of Android. (Plus 2 PCs and a MAC).