The visuals were neat and I liked the "retro" filter, but I did have a few issues with them. The text was barely readable, which in a story-heavy game is a problem. The warping effect on the walls when you move was distracting as well.
The sound is minimal but I like it. The humming sound gave a feeling of anxiety, and the sounds of people outside added to it.
The story is kind of unclear to me. What exactly is Sanae depressed about? I couldn't tell how it fit in to the "official" story of Touhou as well, or whether it was an alternate universe or not. The writing is otherwise decent, and the only other flaw I noticed was that Haruhi should have been capitalized (when you check the bookshelf).