Wow, simply, wow. There was absolutely no aspect of this game that was anything less than awesome. You clearly thought everything through and did one heck of a job. If I had to say an aspect that hit the most, though, I'd say the writing, because, as a writer myself, I SAW WHAT YOU DID THERE.
Lastly, I think I encountered a bug. I was playing the web version and, a few minutes after the beginning, I lowered the music and sounds a bit. After that, the background did not change for a while, even though Kadie's image would change, creating some weird effects like her sitting on nothing.