Hi, I am not sure where to leave you feedback, but I played the demo on Steam and really liked it. The art is beautiful, and I love how the dialogues are written. I noticed some references to the famous cases already, and I really like that the story starts with them not knowing each other too well. As for Holmes, I think you captured his character well. It's interesting to see his moods being turned into game mechanics. He really changes his moods drastically in the books, and I like how excitement leads to recklessness, while inactivity leads to black moods. It does make sense.
As for the first case, it was very simple but fun. I noticed someone brought up the buttons and bars taking too much space. I honestly don't mind the bars on the left, even if they could perhaps be closer to each other. As for the two buttons on the right (relationships, skills), they are quite big and a bit unnecessary; perhaps they could be a bit smaller. I saw in some visual novels that buttons simply remain hidden until you move your cursor into that space. I am not sure if that would be possible to do here, but I think it might good idea.
But in general, I really liked it, and I don't think I was "overwhelmed" with too many buttons. I can't wait to play it once it's finished.
Also, I apologize for my bad english. It is not my first language.