Hm, details please :P
~ Animation ~
The animation was a bit choppy in a couple of places. For example when the car was bouncing up and down from the external view of the vehicle it really didn't look like it was being drove at all, but instead just bouncing up in down.
~ Graphics ~
The drawings were pretty good for the most part, but they still had a lot of room for improvement. The drawings of the people weren't the best, but what I think could help the overall production is more detail in the backgrounds like you had in the one with the blades of grass. That looked great so more detail the better it looks! Also, the soldier didn't look like a soldier at all, but just some random guy off of the street that found a gun to use.
~ Story/Content ~
I think that in the beginning you should have showed the soldier shooting the boy. Perhaps he's fighting some enemy soldiers and the boy surprises him somehow or even just he child getting in the way by accident and he can't check his aim in enough time.
~ Concept ~
It was an original concept for a flash, which is a nice thing to see every now and then. It showed some emotion, but I really thing that the point you wanted to get across was complete sadness and remorse. You could have showed this much better in the facial expressions and some other means.
~ Audio ~
The music was very fitting and really goes good with the idea that the guy is going crazy over this. I think that the beginning could have used sad music and then you could have went into the more upbeat music though.
~ Overall ~
I think that it has a good story and symbolizes something, but you could have pushed it a little further in both story and emotion. Details would really help this submission out as well.