I enjoyed this a lot! Well written and well structured with a nice sense of pacing and mystery. The art style is great and I love the mood established by the background images.
My only nitpick is that the sound effects when you hover over the quick-bar options are a bit annoying. I was confused at first and thought it was part of the soundtrack, but if you wave the mouse past all the buttons it makes a fairly unpleasant sound. I would recommend changing it so the sound only plays when you click a quick-bar button!