1. How does the world feel?
I like the vibe it gives so far, I'm sure as development continues the aesthetics will too. However, I'm concerned that without solid direction for the player it might be easy to get lost in the big space.
2. How does player movement and camera movement feel?
Feels fine.
3-6. I think one way that the player could sense the monster is through sound. Maybe generally the only sound ambiance is wind, but the wind frequency/sound could change slightly as the big baddie gets closer. I did like the particle effects that were present already. I was confused as if the game is going to be closer to outlast or dead by daylight where you're just always on the run and hiding or if there will be more head on conflict. I expect that I only have this feeling since it's the first playtest and my confusion might fade as development progresses, but it may be worth it for your team to address this question.