A new version is available:
- No longer need to block all shots to complete a difficulty
- Upgrade from Unreal 4.12 to 4.14
- Fix attempt for 'head stuck in the ground with Oculus Rift'

Known issues:
- the VR mirror screen is incredibly blurry since the upgrade to Unreal 4.14. I found a workaround though that involves recompiling the engine. Will give it a try in the next days.