Yay.
I played somthing like that when i was.. 5.
If you're trying to go for minimilist modern, you're in the right direction. Otherwise there was nothing to it at all, and it definatly wasnt classical. The pan was REALLY annoying, and i'd advise against using it ever when you only have one instrument.
Consider what a track needs to be a piece of music: A chord pattern, starting on the I'st, ending on the V'th, A backing, a distinct melody and a point where at least one of those parts changes to give a new section of music.