Currently the project properties are saved into the file assets/properties.bin. I would like to be able to change those properties from the Cocoa wrapper application, for example by using app preferences (a Settings.bundle file). That would make it possible to change an app from retina to non-retina and not require 2 apps on the device to test. It would also allow changing the FPS, autorotation, and I believe everything that is configured by clicking on the project and selecting the "Properties..." dialog. The main one is retina though.