Too difficult… some rooms are simpler than others. Any of the ones with squiggly lines are too far fetched. Stage 9 I did a walk thru, and it still makes no sense. Stage 15 with the L+X-z was the furthest stretch ever. The walk thru didn’t help for that part because if you “color in” the L and X and “take away” the X area, you don’t get the same answer. In all, it WAS challenging, and worked my mind.