If you have a camera, you can take pictures of the scenes. Or if you have a program that can take screenshots during the game, you can use that. One option is to print out the pictures and mark where the exits are and where they go. Or if you have a separate computer you can open the screenshots/pictures in MS Paint and use the text option (icon with capital A in MS Paint) to label exits.
Since the game is so dark, it's better to use a computer, laptop, or tablet to display the screens instead of printing them out because the computer can adjust brightness.
It's similar to mapping a maze.