To back up your current progress on your existing device, sign in to create a cloud save account. 

To sign in, tap the menu icon in the top right corner of the screen and then select 'Cloud Saving'. Then, follow the instructions on screen.

In the event of accidental data loss or migrating to a new device, you can sign in again (using the same credentials) to restore your progress data.

Please ensure that you have successfully signed in on your original device before signing in on a new device.

Please note that you can only transfer your progress to another device of the same platform/operating system (Android or iOS).