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.
I am having the same problem on my galaxy S5 today. After 2 or 3 games, it suddenly becomes so slow and Jerky it's impossible to play. Tried clearing cache, restarting, and even Uninstalled and reinstalled. No fix. I suddenly had this happen to me yesterday. Level 1530, Samsung Tab 4. Find it very painful to play.