Love the atmosphere, the pencil style makes the visual more dark and ghostly while the characters still look charming. Personally, I don't find the game to be that scary. On the other hand, when Nao talked about his struggle to connect with other people, it really hit home to me. Good game!
Side note: Even though I said the game is not that scary, it bares an uncanny resemblance to that one dream I had after watching the first few minutes of gameplay of Subway Midnight so it kinda adds to the experience.