Some suggestions (just my point of vue) :
- add a bass line,
- add some fills to the drums (in support of the kick),
- particularizes the transitions between each sequence,
- continue the development of the composition,
- ?
Hi!
I think you take on difficult task! And you must be ambitious!
It is very hard to make jazz on a computer. What is the most important thing in jazz is rhythmic cohesion between musicians - so called - swing. And phrasing - the pulse/metabolism of the band.
But i really like your song, the melody is calming and instruments sound very realistic!
Maybe try to sample some live played fragments?
Do you play on something?