Show HN: Instant.gallery pushing the 3D immersive web further (instant.gallery)

Could some one please explain how to use this? I thought it will be like https://artsandculture.google.com/project/virtual-tours

Probably just not for me, but it was neither instant, nor a gallery. At least in the sense of my expectations of a gallery on the web. Hard to navigate, unreasonable effort to actually view the images.