Interesting game, but needs work.
Even on the low setting, there is still a lot of lag time. I guess there are just too many sprites for even the low setting to handle. It's also rather creative to have the invading intruments be in sync with the music, but only three levels? And after you get a certian power up, it's too easy given how the attacking forces are set up. It's like sniping a marching band who has been practicing the same routine over and over so you know when to strike!