My main appreciations are absolutely all the visual effects, custom additions, and overall the use of the visual part of a visual novel. Effects like fading in the city in the distance as they talk about it, or changing the framing of the scene as things are pointed out. They're fairly simple things that add so much, in my opinion. Attention to details like the color shift in the sprite from sitting by the fireplace were further great touches which I enjoyed a great deal.
The story is something that others are better equipped to comment in detail on, so I'll just say that I enjoyed the storytelling, and think the ending was well done in leaving room for the reader's own imagination.