Don't fix what isn't broke ! a star away for every day I'm ignored before I uninstall completely. I have plenty of storage on my android , and game is freezing as other player stated,and there's an overlayed transparent pop up screen indicating game data and it gives console or clear options. If you tap them they are useless and screen stays on over game. It's very annoying to have to log back on when the ads are freezing and you have to close and open the app on every ad. Errghh ! Upgrades su