You said in your Author Comments that you were "just playing about".
Well, I think that you should pursue this little song clip into a full song. I can just imagine the end of this song clip leading off into the rest of a 3 minute song.
Please build upon this, as it could turn out to be a really great full song. You have done really well so far, so my advice is to not discontinue this. Up to you, though. :-)