This is really cool, great job! It takes some practice, but once you figure it out, it's a really cool mechanic that is implemented really well! I liked the music too. The only thing I would really say is that when you're in the formation where you press space to shoot (pink on top, I believe) you don't technically need to swap positions at all to stay alive. It feels a little weird, but aside from that, this is excellent! My high score (not doing what I mentioned before) was 125!