This is an experience my company had the pleasure of working on. You can find the full episode here: https://www.facebook.com/1317142618394189/videos/2520965584651046. Our clients were Millions of Tiny Robots and you can check out this talented studio here: https://motr.net/.
We were contracted to develop a fully interactive environment that is optimized for VR. While working with strict and tight deadlines we were given a pre-made modular kit to help us build this level which you can find here: https://www.unrealengine.com/marketplace/en-US/product/hq-abandoned-school-modular.
My talented partner Christian Willet was responsible for scripting all of the interactions. I was responsible for level design, world building, modeling/texturing any extra assets, lighting, technical art, effects and project delivery.