Yes shir, well done.
That's actually quite spooktacular.
Don't know how you got the grainy look, it was running at
720, must have been the heavy fog. But that added nicely
to the atmosphere. Overall, it's got lot's of potential.
Is there a way to randomize footfall sounds? Not your fault, but
the same footfall sound detracted from the vibe. A little gooshy
mud sound and other variety would help well.
With a script, you could just cause a random sound to trigger once
in a while when near an object (bush, the water, etc) But good job!