If your game crashes or freezes at random points, we suggest that you follow these troubleshooting steps that usually help to resolve most technical issues:

- Exit the game.
- Exit all other apps running in the background.
- Reboot the device.
- Turn your Wi-Fi off and back on again, then make sure the signal is strong enough.
- Relaunch the game, making sure that it's the only process running.

If the steps above didn't help you to resolve the problem, here are other helpful things to do:
- To clear your history and cookies, go to Settings > Safari, and tap Clear History and Website Data. Clearing your history, cookies, and browsing data from Safari won't change your AutoFill information.
- To clear your cookies and keep your history, go to Settings > Safari > Advanced > Website Data, then tap Remove All Website Data.

In addition, you may also try these other steps:

- Upgrade the operating system and the application to the latest version.
- From time to time, restart the device to free up some memory.

If the problem still persists, please delete the game from your device and re-download it.