Hi Nick,
I'm probably not in the target audience, but still, it looks lovely, I've enjoyed exploring the 3d part.
As a suggestion, a full screen button for the 3d scene would be nice, as I don't have VR, just a regular monitor. And if you're feeling adventurous, you could maybe even add WASD support for greater immersion. But that's a bit of work, as you would probably also have to include a physics lib for dealing with collisions.
Also, I almost didn't see the "try it out" link.
All the best with your project!