This game had a very scary atmosphere, making me question whether I wanted to continue. Although the enemies weren't the scariest thing ever, I still liked their ominous presence, and whatever shiny green thing I collected at the end. I also liked trying to mine everything while casually avoiding the monsters.
My only advice would be to add more incentive to using the gun. I felt it was easier to kill with the pickaxe. A bug I noticed was how long it took the health UI to update properly. The only reason I thought I was doing well was that it didn't tell me I got hit until a little later. Other than that, great game with a creepy vibe that I really enjoyed.