Thanks for the feedback, I am going to look at the lighting today as this has been fed bakc a few times now. The FPS controller that comes from the unity standard assests seems to be an issue also so that is soemthing for me to rethink in the future.
Sometimes maybe I try to be to clever with my puzzles and this makes it too difficult for the player (something for me to work on :) )
Great to get the feedback, will help me as I move forward!