@fubarpk
> I believe the APP icon cannot have transparency and must be in png format
That is for the App-Store icon. With regards to the actual App Icon, all I can find is that it need be a .png file of 1024x1024.
> It might also be handy to include splash screens
I do have that. For several resolutions.
I might add, I just got today a second App accepted on iTunes (well, B2B VPP distribution, not publicly available), and I have the same issue. It do not show the correct icon on the device, but the AppGameKit icon.
I've contacted Apples dev support, but it's been 5 days and no answer. I'm thinking I need bug the AppGameKit devs directly as well - and that soon, as this will not do! As can be clearly seen in my screenshot, in iTunes Connect, the intended icon do show. On device, nope.