I really like this. It's easily understandable but still have so much replayability because of the tables. Great job.
There is also something really fun in doing a voices-tables. I was thinking you could also do a reply table? So if certain words are used by players certain actions happen. It makes it a little more dynamic, as it right now seems like the only outcome is flying skulls.
The item at the bottom is really exciting, I might steal that for an adventure. I maybe I'll just run this whole thing once someone peaks into an opening in a rock.
Great job!