Many of the monsters you encounter in the Spookiest House in the World are more comical and ridiculous than frightening, but if you get too "spooked", the house makes a hideous transformation, twisting and warping almost beyond recognition and becoming even more inscrutable, going from a somewhat typical spooky old house into a visually visceral Eldritch Location. See the page image for a look at the effects of being too spooked.
To make things worse, when the house transforms, most of the normal inhabitants disappear, and all the explanation the text offers for any of it is "something has gone wrong..."
The cameo of Cthulhu, while played for laughs, has a very gross and visceral appearance, much more so than is usual depictions... which was probably the point. See here,◊ if you're up for it.