Oculus rift users:

Kumoon uses the Oculus Rift Runtime 0.5, so you 
need to use 0.5 or 0.6 to run the game with Oculus Rift.

On PC: 
Extended Mode, Rift as Primary monitor.

On Mac:
Just run! If performance is bad, make sure the correct graphics card is running.

'T' key resets orientation / translation.