This is a genuinely scary game at first, but once you realize the monster goes away after you shoot it, it loses the vibe. Maybe add a mechanic that makes the game more difficult? But overall, this is a really cool game.
According to the description (and based on my experience), the monster gets more resilient the more samples you get, to the point where I can't get the last one because I can't chase him off after I get 5 of them. :/