Thanks for your help anyway. Do you know whether it's possible to transfer games to a new Kindle? I don't want to have to start all over again! Funny how some games are working perfectly - I only play King games!
Yes, I don't get the option to update. My Kindle is at least 9 years old so that may be the problem. And also I have a problem with Candy Crush and the person offering me help on that says that Amazon (Kindle) doesn't support King games. I'm on version 1.451.2 and Pet Rescue last updated automatically on 21 June 2022.