The best way to achieve this browser-based 3D environment click-through?

I need to find out what tools were used to create the type of immersive scene shown here:

https://virtualevents.pulsestudio.com/

Accessing via a mobile device has also has a settings option to be able to pan 360 with your device rather than a mouse pointer or finger.

In your opinion, what would be the best way to recreate this?

​

Thanks,

John