Newgrounds Wiki: Movie Guidelines
Things to Avoid
Do not submit something that is merely a sound visualizer set to music, or a recording of your music project timeline. If you want to promote your song in the movie portal, it should be set to original animation like a proper music video; otherwise stick to the Audio Portal.
What you've submitted is a semi-static image with audio. Basically fits into the above category.
Your Art is good & your Audio is good BUT Art belongs in the Art Portal & Audio belongs in the Audio Portal. So you should re-upload both these seperately in the appropriate Portals.
gamejunkie
NG Portal Moderation Team.