i wasn't able to download your link cuz i don't have flash on this computer. but i recommend. not to go against what the guy above said. but cuz it'll help you in the long run. to learn FBF. tweens are an easy way to get things moving but looking at your work in the art portal you could do wonders with a little elbow grease and practice.
but alas...i tween the shit out of things...you should learn both methods. just search the word tutorial on newgrounds or "flash tutorial" on google and you'll find some good stuff.
good luck with everything