How the hell was a 1-minute piece only 3.3 kb? Anyway, the "flute" sounded way too synthetic. It needs to sound more flute-like. Other than that, maybe it could have done with a counter melody, or something else playing over the back of the flute.
Thanks for the suggestions. I tried to make the flute sound a little better, but I'm pretty limited in terms of instrument patches. Also, I did have a counter-melody being played by the strings, but I guess it wasn't loud enough, so I added a slight crescendo. If you still can't hear it, try listening to it with a louder volume.