I think you need to strike a balance between giving out something to entice players and keeping your cards close.
Right now I feel there's too little to go on and you'll probably miss out on a lot of players since many won't bother to download something they don't even have a clue in which direction the game is going. It would be a shame as there are not too many dark themed HS games out there.
The trick is to reveal a little enough to entice people to download to try and yet retaining flexibility by keeping things vague. Now your demo situation is more like totally no info rather than being vague.
Hope this helps!