Flip display for HUD mode

I am experimenting with using the main watch unit in a Head-Up Display fashion. Basically the screen of the watch is reflected off the an optical glass with a partially reflective coating. The information displayed on the watch needs to be be flipped vertically, it would not be directly legible on the watch but when reflected once the reflection would be legible. There are limited app that show speed and navigation flipped but I am interested in the OS shown flipped as this would allow to use Google Maps, Waze and other popular drive related apps. Does anyone know if this can be achieved from the software side?