I love the look of the game! It feels very ominous and kind of like Pathologic 2, even from the get go it made me uneasy and like there's more going to be going on than meets the eye.
It looks like from your game design doc that y'all did all the 3D modeling? I'm very impressed, it has a cool N64ish but realistic look.
You've definitely got a good start and I think if you continue the project then you're heading in the right direction!