This app is terrible. After you complete all the requirements they fail to give you credits. This has happened multiple times. Most recently it was a tiered point offer. I got the credits for the finishing (level 12) but not for the prior tiers (level 10). They had the same time frame for completion. I have explained to these people until I am blue in the face that you have to complete level 10 before level 12 but they keep telling me I didn't complete it in the window. Use a different app!