If you have Android 4.0 or higher, and are making In App Purchases from Google Play, the confirmation that Google Play provides TNNS is taking time. This is not the order confirmation you get, which usually still happens immediately. Once you make your purchase and it returns to the TNNS "please wait" screen, you may need to wait up to 5 minutes. Please don't close the app during this time, or try to start playing again. Just wait while your stars are added.