Your game crashes due to several possible reasons. Please try the steps below to troubleshoot.
1. Close all other applications.
2. Check and update your OS version.
3. Check your network connection status (Wi-Fi or mobile data).
4. Change the graphic settings on Dark and Darker Mobile.
5. Go to Settings > Applications > DARK AND DARKER MOBILE > Storage > Clear data and cache on your device.
6. If your existing account is linked with a social network, please attempt to delete and re-install the application.