I stopped playing the game after arriving at this section. I spent 35 hours or so just getting through the Valley and to this point. Don't know how complex this part is, raising and lowering the rock platforms with weights and hopping across the pathway that drops you down to the basement if you step on the wrong spot. It looks like quite a struggle in the video walkthrough that I saw, though it does appear that the parts of the path that you identify stay lit up and accessible if you have to start from the beginning again. A very similar idea in a game I played years ago had a suspended path that regenerated in a different configuration every time you missed and fell through. Never did finish that game.