the good news is that Itch does support WebXR (I've played other WebXR games here). The bad news is that this game never seems to load. 🙁
The Sentinal VR
If this game doesn't work (because I don't think Itch supports WebXR games), please try it at https://stevesmith16384.bitbucket.io/vr-sentinel/
This is a remake of the classic game The Sentinel. The aim is to get higher than the Sentinel and absorb them to complete the level. The Sentinel slowly rotates, and if they see you, you lose energy. Once all your energy is gone, it is game over.
To move around you can teleport, which costs energy. You absorb and creat6e trees and rocks. Rocks will create a raised platform, which will enable you to get higher.
Source code: https://github.com/SteveSmith16384/vr-sentinel