This game is pretty interesting. It took a little bit (and watching part of anothers play through) to realize that there is an ultra violet. (In the 'advanced' settings it also says that there is night vision, but never found that)
I also found 3 different coordinate things with the ultra violet, so I know that there are some secrets, or something to find, but I could not figure it out in my tired mind haha
Awesome concept for a game!