Needs Some Work
Pros:
1.) The concept wasn't bad. It could use a little work, though.
2.) The song was amusing.
Cons:
1.) Your artwork was...not that great. Try animating a bit more...and by animating I don't mean simply moving a picture of a missile across the screen.
2.) It was a bit short...and repeated. That's a small problem, but nevertheless, it'd be great if it was fixed.
Advice:
Fix up your artwork a bit, and make the submission a bit longer.