I tried above game.
As result, no screen on smartphone (only steamvr room) and on the PC there is only a window displaying game about 1 or 2 FPS (very low framerate).
However on window it reacts properly to smartphone orientation and one can see controllers properly.
I have new i5 and GTX970 where I played 10+ games and never seen issue like that except of mentioned game. I hope you could check why game behaves so strange and we can let that know to game devs.