I like the idea a lot! The presentation is also great. I think it could be a little more clear, when the player is in the moon light and when not - sometimes it seems to be a little unexpected.
I got a little stuck at one item. I think it's a great idea having to be in wolf form for certain abilities, but having to kill humans works against the goal of not killing humans. Also visual-wise it isn't clear, that there's a gap in this room. Because of the dark walls the telling is a little off.
But as I said, overall I really like your game.