Overall, extremely cool game. I love the art style, the sounds are cool, the concept is cool. But, perhaps ease the player in a bit more. Simple, for dummies mechanics first, scaffold the harder concepts and make them piece them together gradually. I never would have figured that out if you hadn't mentioned it. In hindsight, I can now sort of see the clue you get with the black light, but without that added hint I never would have gotten it.