The word ominous comes to mind. I like how you never fully see the surroundings in there entirety. It makes it feel like something or someone is just out of shot watching. The sounds are very intense. I think it is interesting that the bell ringing and the cuckoo clock can have two different meanings, a warning for the children and adults and an alert for the murderer that it is time for his next victim. Very creepy. You want to watch and turn away at the same time.