Sorry for the late reply, what kind of tutorial/documentation would you need?
If it is about the bulletml language, it would take some time to make so we recommend you to read this one instead
http: // pixelnest.io / docs / bulletml-for-unity / pattern-file/
That one is not made by us, it is from the unity plugin for bulletml, but the xml should be the same or similar, you can try it.
If what you asked is about how to use the plugin itself; We will make one real quick. For the time being, you can check the capx we include to see how it works.