It's important to perform backups of your game from time to time.
Titanium Backup is a very useful app for this purpose. You can schedule automatic backups, apply labels to define different categories of applications and apply specific tasks.
For example, you can easily create a task that will "backup all your games every Monday and Wednesday at 11pm, only on AC or USB power , and synchronize to Google Drive once finished ”
It is also possible to synchronize with Google Drive. You can chose to export partially or globally (app + data).
The backup can be stored in a tar.gz file for example and be imported very easily when needed.
I use it for this game and many other applications, and also the entire system.