The demo didn't work for me. This shows when I open the game:
I didn't have any issues, perhaps give some more details and/or contact Earnest.
Doesn't work for me either. I'm on Valve Index. It shows this window and then starts SteamVR. If SteamVR is already running, it just shows this window and nothing in the headset. No reaction to controller or headset movements either.
