As Alex says in his description of the experience:
Follow the path, don’t stray. Keep on walking all the way. Studio Skye presents a Halloween journey to oblivion. This is a VR-optimized experience, so strap on your headset and get fully immersed. If you don’t have VR yet, turn off the light, get close to your screen, get some headphones on and enjoy!
I’m not going to spoil this at all, I’ll simply share a photo of the starting point. And a word of advice: please set aside some time to explore this one.