Good development
I could definately make out a clear distinction between areas without being overt about it. I would agree with Benjamin that your melody would benifit from a transfer of instruments, but I would even venture to say change registers of either the solo instrument or accompaniment! That way, you could let your melody sing out on a totally new color of the instrument of your choice!
I am not really sensing a climax, but if it was in your design to do so, then that is what you want no matter what I would say.
Good job, nontheless!