rn it works like this:
Select a body part you want to get back
Add runes to the rune circle
The selected body part will go red when something wrong was added
Blue outline when something correct was added
Fully blue when you recovered the body part
There is not much feedback except when you recover all body parts. We didnt get to that part sry
(This will change in the next version. We'll add descriptions to the runes so you can infere which part needs how much of anything)