This is actually one that I have perfected and it is not completely improv (only about 30% this time). This is some of my own creation that is complete and ready for flaming, kudos and whatever else you have to give!
Kinda' reminicent of Heathcliff's Haiku Warriors in the style of fingerpicking in the verses...anyway, if you listen to any, PLEASE LISTEN TO THIS AND GIVE ME FEEDBACK
oh yeah the talent show, i'm retarded, so how old are you if you have been playing for 9 years, and are in a talent show that I am assuming is high school or college?
I really like it. Nice jazzy feel. Chord progressions that make sense, but without being predictable. The one weak part I think is the section that begins around 1:25. Doesn't seem to fit with the vibe of the song, and the progression is quite blah when compared to the quirky unpredictability of the rest of the song. I'd scrap that part. Other than that, I'd say it's good. I especially like the transition back into the A material before the end. Good stuff.