John Lloyd1
Rigidly defined areas of doubt and uncertainty
My advice is
Another thought, make it a well constrained and obvious puzzle. If the clues and solutions are all in one room and it made very clear it is a puzzle, they may have something they can engage with. (i.e. "within this room are three items that will open this door to your desires" is engraved in the door).
				
			- Summarise and regularly repeat the clues.
 - Be really explicit and obvious.
 - Give them a physical item like an index card with the clue written on it.
 - Link it to a meaningful choice.
 
Another thought, make it a well constrained and obvious puzzle. If the clues and solutions are all in one room and it made very clear it is a puzzle, they may have something they can engage with. (i.e. "within this room are three items that will open this door to your desires" is engraved in the door).