The game is obviously in the early stage of development but it's a good work so far. It took me a while to realize that the second sound effect is probably the blood spots hitting the ground. I find that strange, I don't think it should make such a strong noise, and audible even when you run away from the place. Also, there is not much showing of the AI yet, other than the last zombie moving a little towards the player.
What I found nice is that the stepping sound is in sync with the running animation. At a portion of the video however, I felt that the stepping sound was replaced by the blood splatter sound - or was it just obscured by it and the sound was accidentally the same rhythm? I think the stepping sound should be the louder effect.
Keep up the good work, there is still a lot to do on the program but you know that.