Hmm, will look into this and why it doesn't work properly with an Index. It should work with an Oculus w/Link if that's an option.
The cave is super cool to traverse! Some baked lighting would make a huge difference as well. Seemed some of the lighting was a bit morked (pitch black areas and some odd shadows) but otherwise the environmental work was superb. There are a couple spots you can get stuck as well but still great work for a jam!