Compared to another game i played of you, this ones hero didn' seem as "bad" as the other one, something like sleeping pills is being used in a lot of adventure games, so i don't see the problem.
The puzzles were alright, the only time i needed a walkthrough was to figure out the secret code was on the flyer(which was quite misleading). The fact that there was a room in the music building you couldn't enter was also quite misleading, since there was no point to it.
The ending ...was boring. I think the astral projection theory is nice and everything, but in the end, we got no closure, it was still left to the open, anyone could have done the murder.
But aside for that, again, great game