I liked it, though it could have been better.
I loved the sound of the bass, but it was extremely out of sync with the other instruments being played.
It ruined the feel for me a bit, but I still liked it non-the-less.
I think you succeeded in the sadness part. I'm liking the style of the song. The slight slip in harmony between the instruments is a nice touch. The only request I have is that you make it longer.