on level 5
after the sign "shy sanctuary"
it repeats indefinitely "you must hurry he is coming etc..."
Clipping issue
on level 10 "ar thrial"
in the room where the crystal is
better shown with screenshots
seems that the object is showing his "back"
it take me time to understand how to kill the ogre just after the crystal! I didnt see the pullchain of the iron door, because it does not match for the iron door, or maybe that was part of the trick?
by the way: the secret thing, which can not be named here for safety, can be taken before the wall slides down. Hope it will be useful, or maybe you shouldn't plan that?