There are lots of problems with the image.

 >!  1. Red and blue squared stars has been used a couple of times.   
 >!  2. Yellow part of the sea has been used three times.   
 >!  3. You cannot have stars inside the moon and the white blue area is added later and there is a clear blur in the photo as shown below.

To illustrate:

>! [![enter image description here][1]][1]


  [1]: https://i.sstatic.net/ntMhs.png