I figured out a workaround for the download failed errors. If you install the version of Subway Surfers expected on an actual Android device and run it, then make sure you cache everything it needs, you then just have to copy the UnityCache folder from Android/data/com.kiloo.subwaysurf/files/UnityCache/ to the equivalent in the ss_nx folder. This allows for using all characters, all music tracks in the settings, and all boards to have proper preview images. It does cause load times to increase a bit though (probably due to all the small loose files)As for your other request I think it's complicated for now. It's related to online services just like when I try to get rewards by pretending I've watched the ads.