You do not get more skills. But you are free to add your own, that's the fun with games. But I have some ideas about fire for the future, but it will be very simple.
Thank you for those catches regarding the map, I was messing with the map up until publishing and this slipped through the cracks. Appreciated, and fixed! (pdf updated).
Ongo Gone is not tied to a location, you are free to place it wherever you wish.