It took most of the day, but I finally got the game to work on any screen size. I created an invisible object to use to track the size of the screen. Then I set everything else according to the size of the “screen tracker” object. I came to this solution after speaking with a fellow developer on the Construct 2 forums. I uploaded the game and I am now waiting for it to be approved. I am going to be updating Disco Wars to be compatible with multiple screen sizes the same way I did with JAMES.
I have nothing left to do on J.A.M.E.S. except wait until it is accepted on the app store.