I Don't know if someone will ever see this comment but speaking about the theme ; In the lore when you're black you are in the "untruth", then you become white and you are "stuck" in what I called the "Truth". That's why at the begin, the game tells you "when you know something you can't forget it" because once you're in the Truth you can't go back in the Untruth. So at first, the game lie to you by showing you only a part of the level a sort of false level. (Poooof mind blow).
In fact it all should've been told with the text below but I prefered to concentrate my self on designing the levels.