We're aware of an issue with Facebook purchases for all King Games and our team is on it. 🛠️ Hang tight while we fix things! You can still enjoy the game, and we'll keep you posted once it's solved.
Sad to say, the only way to transfer the games is to add them on FB, then link the games on your Nexus to your FB, then download the games to your Ipad and link all the games to your FB.