Very cool mechanic! I couldn't seem to figure out the trick to it, though, I kept getting bashed apart. I like the sound design, too, very relaxing :)
A little bit of luck is involved. Besides, I should have explained what the different Colors do really. Did you realize that your green vertex/Vertices represent your life total?
I did notice that getting hit in my green vertex meant instant death, but I don't think I ever managed to get a second green vertex.
