Now i'm terrified! This game is awesome. I loved the atmosphere and the ps1 graphics. I could not stop playing it.
The first part, when you see the flare is great: you now your friend is in trouble. And when you find the underground you feel every room as a real threat. I was sweating.
To give some feedback, at first I thought the gun was not hurting the creature, maybe a larger hitbox and larger visual and audio effects would do the trick.
It is the perfect game for a game jam: short, beautiful and captivating. You should be proud of it! Congrats!