The 2 parts (left and right eye) comes from the occulus rift plug in. I think in the next version of unity it will be standard. You just tell it you need 2 VR screens.
As far as the game, it is just a 3rd person controller with menus. Nothing special. So basically anything you can do in unity, you can do in playmaker. Instead of code you use actions. Real simple.
You need to learn unity (try their tutorials on their web site or the walker boys website), learn playmaker and go for it.