Great piece. At :28 and 1:16 into the song, the piano solo takes on a life of its own but then it is cut short. If you carry out that solo a little longer that would really give your song a boost. Extend it by piecing together samples similar in style to it, then come back with the slower piano rhythm. I think your structure is good, but there are a lot of change ups in the song...changing from one style of jazz to another. If you decrease the amount of changes or space them out more, it would help structurally. The song is only 2:32. You have a great start here. Continue to work and build on this...it has the makings of a great jazz piece.
Nothing like the sound of an upright bass to slip you into that "jazz" mood. The idea is great, just a bit of tweaking as Brenda mentioned would bring this right into the groove.