This puzzle is now revised, fixed, checked, and double-checked.
It is also the last (certainly for the time being) of this class of emoji-portal 'classic' mazes. Portals are always in adjacent levels and at the same location. Do not be confused by apparent duplicates that are in non-adjacent levels / positions! They are doppelgängers
Your mission: Start at "Start", and travel to "Exit"..
