I forgot to mention something else! When approaching the abyss, a message popped up, saying something like "return to the surface." I pressed OK twice, but nothing happened.
And this is already worse. You are returned to the surface if you misunderstood the puzzle.
So, excuse me, did you choose all the skills in the end? Did the lights turn on?
Added 2 minutes later
Yes, there was a bug with the object's name. I fixed it.
