Incorrect aspect ratio

If the aspect ratio of the game does not use the full screen of your phone, please check if your device has a "Full-Screen mode" setting. If so, please enable this option for Gods&Glory.

You should be able to find this option, if available, in the settings of your phone.

Soft reset

Hold the Power and Volume Up buttons for 7-10 seconds. Your device should then restart. 

Clear cache

You can clear the cache of your Android device under:

Settings → Apps/Applications → Select App → Storage → Clear Cache. 

The arrangement of the settings depends on the manufacturer of your phone, but you should be able to find a list with all installed apps in the settings, just the name and the exact location is different.