There were a few areas that confused the hell out of me, one off the top of my head was Chapter 4, room 19. It took me a while before I realized that I was making the jumping more complicated then it needed to be. Once I got past that, figuring out the room itself was cake. I felt dumb, lol.
I'm on Chapter 7 I think now, took a break, waiting for PSN to start back up.