To force close your app, exit the game. Then double tap on the home button and all your recently used apps will appear. Swipe up the app you wish to force close. Once you do this, it should disappear from the apps you have open. Be sure to swipe it up completely!

If you can't get this to work properly, you can try restarting your device and then running the app. Some players report this resolving the problem outright. If that doesn't work, please let the Support Team know and we can take a closer look.