No jump scares, no enemies even (unless you count platforming challenges and death by falling). Just a grim world, and a couple of scenes that you could consider body horror. It's more about the bleak atmosphere and a simple (but hopefully effective) story than trying to make you jump out of your seat.
I actually added a 'no-jumpscares' tag based on your question, since I think a lot of people would be interested in that information when it comes to horror games :)
-Jay