1. I'm pretty new to horror games and I feel like this game was quite exhilarating. I do think some parts technically didn't have much going on but the atmosphere made playing a rush.
2. The map size seemed great though I'm not sure what areas I didn't see and what areas I saw twice. I think more landmarks or things like colored walls/floors could help to make places more memorable.
3. The visibility felt decently bad which was perfect! I felt like the limited knowledge about the whereabouts of the creature and myself was just right. Too much worse visibility and it would just be frustrating.
4. I think that the look of the flashlight and the battery mechanics are the coolest part. It may be ambitious, but some Legend of Zelda style light beam reflecting could be really cool.
5. I think that the creature's behavior was a little wonky. There were a few times where I died and I deserved it and a few times where I died and it didn't feel satisfying. AI is pretty hard, but I would definitely make it so that the player has a general sense of when the creature is near and far.
6. I honestly cannot testify on the difficulty of games like this but there weren't really any glaring flaws. Just like I said before, I think the only thing that may need adjusting is the creature. I died out of nowhere a couple of times.
7. I think all the mechanics worked really well. Not mechanic, and not really important to this first playtest - I think your addition of art assets and more flavoring is going to be crucial for this game to hit the mark. So far AWESOME work though. Excited to play again next playtest!