Hmm, so "good" is not what you want,
well in my very unprofessional opinion, here are the things that bother me:
That cymball is just overly pronounced, maybe mix it in differently or try using brushes (if it's a Reason composition or some other software)...but in general it feels like the drums are too pronounced, try mixing it so they don't overpower the rest of the instruments, and maybe even change that tom drum to a soft snare.
And the part around 0:28, sounds wierd to me, like the beat is off or something.
As are drums too "loud", the bass in the first part is too quiet, later it's ok, but in the first part it's just faint and since it connects the melody to the beat, in the first I can basically only hear the drums, everything else is hard to detect.
In general - the tune doesn't sound very original (that might be a personal opinion though, a lot of jazz and blues sounds very similar to me) or complicated, but it's a nice tune. I imagine this as a background for entering a fancy art deco decorated restaurant.
Hope that helps in some way.