Great job for a first game! I really enjoy the graphics. Seeing the mountains silhouettes in the distance is really cool. Kinda had a silent hilly feel for me.
For suggestions, I would say some sound effects (maybe just echoing steps or breathing) could really help the creepiness. Also I agree with Kenneth that I don't think you need jump scares for this one, the atmosphere is carrying the experience. If you wanted to keep something explicitly unsettling, maybe have the guy that chases you just follow slowly at a distance and watch you. He stops when you stop, so he's always at the edge of your vision, but always watching.
The only big downside for me was some of the audio volume. Some of those jump scare sounds could really damage some ears, you'll want to make sure they're balanced a bit better.
Nice work!