Example of Unity scene export and Tanks! Tutorial Unity WebGL export fully playable inside of an arcade cabinet.
There is also an assets folder which contains an export of individual objects and an example HTML from which a builder can use to drag and drop into JanusWeb.
To learn about how you can export Unity scenes into JanusVR, check out this guide: https://madjin.github.io/janus-guide/#/guide/unity
The portal in the corner is a custom component which leads the user into a unity webvr demo by Mozilla: github source.