Do we have control of that? It would be nice to have it match the screen orientation, as it does in other apps that have horizontal orientation.
I don’t believe so, no. But in the end it should be up to the device AFAIK.
No, if it is based on accelerometer data, it’s not handled that way with Unity. Shall I file a feature request via Bug Report?
Sure, that sounds like a good idea (unless we’re shown the light and have it explained how you can control it).