You'll see a lot more blood in 'Saw' movies or something like that than you will in either of the 'Last House' movies. I kind of think it owes more to 'The Virgin Spring' which is the original source material, the Bergman movie.
If a man’s imagination were not so weak, so easily tired, if his capacity for wonder not so limited, he would abandon forever such fantasies of the supernal. He would learn to perceive in water, leaves and silence more than sufficient of the absolute and marvelous, more than enough to console him for the loss of the ancient dream.