I played the free demo, and am very eager for more. The writing is wonderful, setting up potential mysteries and character that I can't wait to explore. I like the art for the sprites, you can really get a feel for the different characters. The music as well had a particularly haunting drone that heightened the tension.
One thing I criticise is that the way the game is formatted means that the text is often overlaid over the artwork. This makes sense because the writing style is less dialogue-focussed than other visual novels, but it still means that the lovely art is covered up and it can be a lil muddy to read! If the creator's have ever played/seen the visual novel Lamento, perhaps that sort of layout may be better for future updates: the sprites have their own little boxes with a stylised background, and there is a space in the middle for the text.
But I can't wait to see more :3c