It loops nicely! The animation's swift, nice motions and character sketches, like a mixture of stick figures and Madness. Now all it needs is some length! :D As for the song, if you add the song in the first frame (and make it loop), and have the last frame redirect back to the second frame, you could keep the music loop independent from the animation. Didn't get to see this with the music, but everything's better with music. Keep it going!
-cd-