How to migrate from a game version to the next one on Android
First, you need to download a file manager. You can find “File Manager Plus” on the Play Store for free.
Grant access to the app to access all local files.
Go to Main Storage (or SD if the game is on a SD card) > Android > Data
It will open up a prompt, accept the prompt, and grant access to the Data folder by pressing the “Use this folder” button.
Go to com.random.extralife > files, and long press the saves folder. Copy it.
Go to any location on the phone, like Documents, Downloads or such, and paste the folder there. Your saves are now backed up.
Uninstall the previous version
Install the new version
Start the new version up, then exit it
Copy the saves folder from the backed up location
Paste it in Android > Data > com.random.extralife > files
Merge and replace everything
Start up the game, and enjoy your saves :)