This is a "timed mission", where you must run as fast as possible to the exit as you can, or else die. As soon as the player begins climbing the stairs at the start, a Crushing ceiling will begin to descend around a Voodoo doll, which will begin damaging the player after 30 seconds.
On ITYTD and HNTR, after the blue skull door area you should have clear path way to the exit area ignoring the 4 paths to your right side.
On HMP blocking your first path are 3 short fire torches, forcing you to go around them the long way and then take the shortcut for the second one.
On UV now all 2 shortcuts paths are blocked with short fire torches, forcing you to go around both of em the long way, on the second one the floor also lowers into the lava + two demons and a aracno block your way to the exit.