This sounds very much like something I'd hear out of an old-school OST. I like the almost bossa-nova type rhythm you have going on in the bass. I think you did a lot with what you were working with and I could definitely see this expanded a bit longer if so desired. If anything, I'd say to make the beginning a bit less jarring of an entrance. All of the ideas sound connected and nothing really sticks out to me upon a second listen. Nice and interesting harmonies too. Nice stuff!