I like it, but I do have a few suggestions.
- Find a way to make the music NOT stop playing between enemies. If someone just sits there and blasts through them, the music resets, and that's sad when you haven't reached the good part of the song and it starts over. XD
- Why is there a random black block on the left hand side? If that's useless try removing it.
- And finally... Can you explain what this is suppose to be? XD http://i63.tinypic.com/2ivgtxl.jpg