So I worked this design out, which was originally very large (1200×1200). I finished it and then set it to the required sizes for submission, 640×480 as a jpeg. I received the rejection mail that I had issues with my format. I contacted them to pry them for further information and am waiting for that reply. In the meantime I thought maybe I could get some critiques on this, perhaps fellow photoshop users can help me out here (I never have format issues in illustrator hehe).