It's currently not obvious how to go from a screen component's coordinates (for a given element) to physical screen coordinates and then on to world coordinates. For example, if you want to place a particle system at the location of a UI element. One or more utility functions to make this easy should be added to the API.
It seems like wasd-acceleration prop has no effect. I've created a codesandbox so it is easy to see the bug. The acceleration is set to 10000 but there is no change in acceleration from the default acceleration. This issue is also reproducible with the boilerplate mentioned in the README.
When you have a 360 video in the room, if your cursor is over it, it dims for the overlay controls. Most likely we should avoid the hover overlay on 360 videos (since it's impractical to change their volume anyway, which is the main reason you'd have overlays on them)