In most cases, purchases happen are processed immediately. However, please bear in mind that some purchases may take up to 2 hours to arrive in your game.
However, we highly recommend you to first check if you received your purchases by refreshing your game! To refresh the game, follow these steps:
1. Press your Home button twice.
2. All your open apps will be displayed. You can swipe to see each of them.
3. Swipe LightEaters upward. This will close the game down.
4. Now reopen LightEaters and check if you received your credits.