It's a little late in the season to be begging for snow... ;)
During the improv, I would either remove that string/pad or have it played more throughout. It's a little random to have it play those two or three notes and then stop. I guess jazz is a little bit random, by nature though...
Once the actual song started, I struggled to find the lead instrument. That's really the only thing that "Actual Song" part is missing. Find some way to solo over it (maybe a sax)
What's up with the ending?