Neat
That was not bad. Good to see you put a lot of work into it and didn't release a piece of crap.
I did notice a glaring issue though. Your screen was bigger than you flash. I could see your man's legs walking under the Flash because you had a border discrepency. There is about a half inch of white background on the top and bottom of your Flash. That needs fixing.
It may have come when you uploaded. You could have put in the wrong size. Also, it may just be from the Flash itself and you used a screen that was bigger than the Flash you drew.
Good Flash though, but be sure to replace the file with a fix later.