If you want to save your progress in the cloud, please follow the instructions  (you need to be logged into iCloud/Google account on your device):

1. Start the game and open the game settings.
2. Turn on cloud synchronization by tapping the switch (or gamepad icon for the Google Play version).
3. Do NOT accept progress restoration if the game asks you.
4. Turn off cloud synchronization and then turn it on again.

If your device doesn't have Google services installed, then you won't be able to save your progress in the Cloud!

If you want to save your progress in Facebook, please follow the instructions  (you need to be logged into Facebook app account on your device):

1. Launch C.A.T.S.
2. Go to Options and log into Facebook.
3. Open the Facebook app and go to Help & Settings > Privacy Shortcuts > More Settings > Apps > Logged in with Facebook > C.A.T.S.
4. Enjoy the game!