Awesome game, but i'm just bad.
I really like your entry, but felt it was to hard, then I seen the leaderboard, and realized i'm just bad :P
Although the music was really repetitive, a really cool feature to add to combat this, mind you extremely difficult would be to have sfx upon enemy death that matched the audio. This way as your killing the enemies your also making a really cool soundtrack.
Again, really cool game :)