Not bad at all...
I dunno who zero'd you, but that really wasn't deserved.
I can only see two areas for improvement myself - the first is the hi notes at about 34-55 seconds - the quality of those notes doesn't quite fit the other instruments.
The other is the rythem section. It would probably sound a little more real if you added some more layers and varied the timing a bit between those layers, so that it sounds more like a natural play. At the moment the timings just sounds a little too clinical.
Then again, I'm not exactly an expert in this stuff. Probably better ways of doing that. XD
Other than those, it is a good peice. Consistent, mixed well, and something that can be built off. Thats pretty much exactly what you want in a theme.
-Malt
s(~_^)b