Echochrome Video Walkthrough

Well, in my new-found discovery of recording video game play, I have now begun work on a new video walkthrough of my recent obsession, Echochrome. As of this posting, you can see both A and B courses solved fairly efficiently on my YouTube channel. I've got D nearly done (C is harder for some reason) and I'm going to keep adding to the walkthrough as days pass. Just trying to give back to the community...