I've Got It!
I understand finally! Agent 47's bitter nemesis Agent 43 (you'll get the significance of 43 when you look closely) killed Roland Johnson! Oh wait no, that makes no sense nevermind. (Sorry)
Hm, this is my FAVORITE genre of game, so maybe I was a bit more harsh in judging than I usually am. There's one minor problem I have with the game, the detective seems to be not the very courageous type. How many times does he back down from something major, or a major development - or scream like he's scared? As for slightly larger things, I THINK I got to the end, but I don't know. Does it just start you from the beginning again, or did I close it too soon? Also, there are 2 things I can think of specifically that didn't have any significance in the game by the end, also, what was the point of the television, does it do anything?
[spoiler alert]
I will give you this though, the room on the 4th floor did spook me a bit (but it annoyed me when I couldn't go back).
I don't mean this as discouragement, just as things that rubbed me the wron way as someone who like this genre alot. Keep at it and I think this or others have the potential to come out great. :)