I don't want to make this a debate, but I have to side with Mr Lex. The piece has met unreasonably sharp criticism, especially from Kije and Jujimufu.
Kije-you don't even address the music itself; rather, you just state how you refuse to listen to it. That's fine if you don't want to listen to it, but I don't exactly go around posting and saying that I won't listen to someone's piece. Even so, what you criticised was already covered by two previous posters, so your post really has no value, to be honest.
Jujimufu-Again, you don't address the music itself. And I think it's rather naive to say that you "can't bother to listen to a piece by a composer who hasn't bothered doing these least things to write properly for the instruments."
-In a recent upload of your's (
Piano Concertino - Capriccio for the Young Jazzist), Qccowboy points out that you wrote improperly for the flutes (below their range). Clearly, that's something that you should've learned through research, if you didn't know how to write for the instrument.
I'm not saying that you shouldn't write for flutes now, but not only are you being a hypocrite, you are being too critical and not giving the composer the benefit of the doubt.
But as for the music, I'll have to agree with DOFTS. I think your piece just need more thought put into it, based on your solo instruments. Like D. says, it just sounds like anorchestra piece with added harp and koto. Also, do you have any other movements completed yet? And what is the overall idea of the whole concerto: is it a showpiece, or tone painting, etc. (both are fine)?