Your not too bad for only 14 years old. You seem to be decent in animating and your animations can be quite smooth at times. The stick figures seem to have creative personalities. You draw stick figures better than most people as well.
There are bad things about this flash, however. Most of the lip syncing in this is off. And for me its hard to hear what they are saying half of the time. The plot was hard to follow at first, but you kind of cleared it up at the end.
Overall I think you need to make some of the voices more clear and understandable. You also need to work on lip syncing. I thought this flash wasn't all that bad, even know I didn't know what the hell was going on at the beginning. Keep practicing, thats all I have to say.