Just wanted to give my first impressions, starting out I think you have done a great job with the writing. A strange compliment to make but I have noticed with a lot of other games that I have tested out here that writing is not a common strong point, so it is refreshing to see it well done here. What I mean is that it is not littered with errors, it makes sense to read, and the story is interesting.
I think the puzzles are perfectly fine, they just require a bit of thought. I was able to solve them quickly.
I have issues with 'Ai' being a bit too unlikeable though. it is possible to make her likable and dominant at the same time, making for a more satisfying read and a better ability to connect with her. Though this could just be a mistaken first impression of mine and things may develop in a more satisfying way later?
I think the extra artwork is a good idea, not sure if this is just a first template but I feel it could be a bit cleaner as it looks a bit rough right now. Though I do like the way Ai looks, especially the eyes.
I hope I did not sound too harsh with this, and I would like to say that my first impressions were good and I did enjoy trying this game. keep up the good work!