Wow.
This is some great work, and I can definitely see some room for improvement!
Now onto what I see could use some touch-ups:
For starters, there's the animating of the mouth. It was off, either the movement or the voice acting.
When you have some time to hone your skills, come back to this to touch up on body animations. They were good and fluent, just not good enough.
Another point to mention is background layout; when you did the panorama after Kilik tripped, it looked like everything was 2D, and that the street on the left was coming out of the second floor of the building on the right.
second-last is sound quality. I know you stated that it changes, but try to make it more fluent and synchronized to the body animations.
And lastly, try to incorporate some more shadows to the animation. It'll give it that much more of a dark or scary edge.
I love how the chromatic color blends well with the story, and how only the blood has any real color. DON'T change that bit, it's completely fine the way it is.
If you can manage all of that, I'm sure you'll do fine with any future projects or continuations to what you have going here.