Very interesting game idea! I tried to change the mic sensitivity settings in the menu but wasn't sure if anything was actually changing. I think the game should display how many logs you have currently because since the game is so dark and there is no feedback (like a sound effect) when you pickup a log, I probably backed into one without even realizing it. Speaking up doesn't light up very far and its only for a moment.
Some things I would change or add.
I would change the volume of the monster's footstep to be based on how far away it is from the player. I noticed the screen shakes does this already, which is great! I would also stop the sound and the screen shake when the monster stands still. The torch fire is constantly in the way when you move to the right, I found myself always strafing to the left to avoid it blocking my vision, not sure how to avoid that but wanted to mention it is a bit of an annoyance.