Poor. The app freezes more than it allows me to play. I ha e to restart the phone or reinstall the app and sometimes, even that doesn't work. Also, skipping after you've won a game to start another game should NOT stop you from collecting your exp points. That makes no sense. You should still get the points even with skipping. I understand that ads are how you make money, but those unskippable 30 second ads that occur between almost every game are ridiculous, please make all skippable.