It is a very interesting mechanic, it's very intense since you don't know where you or the monster are.
I think the idea is to use the noises to find each other is really cool, the only problem is that they are both listening the same audio (of course, they are in the same computer) which makes it less intense.
I did not quite understand how the soldier mechanic work either.
And the "how to play" section could have less text, since people tend to be lazy to read it all.
The lightning effect is really cool, it adds an very atmospheric tension, if i recall correctly, there is one like this in Luigi's Mansion, right?

With a little more of ambience and art it can be a cool game.
Would your inspiration be Dead Realm? It's very alike.
Keep on the good work!