Hello!
The first step is to mark your intended path with an "i" - you may not get the chance to follow that path if you roll 2d6 CATACOMB CONFUSION and have to deviate. If you are forced to deviate, mark that as the actual path you take with the "arrow". The "right" and "left" are intended to mean "of the hash mark with an "i". Clockwise and counterclockwise also work and serve as a great visualization for a character standing in the chamber!
Thanks for checking the game out! I hope this helps!