But I'm only twelve!
Listen, kid, on the net, as far as this stuff goes, age doesn't matter. The younger generation should be learning all this stuff faster than us old farts. So don't use your age as an excuse. Just simply say that you're new to flash.
I agree with Hydaulic below me for the most part. If you have a sound editor you can raise or lower voices.
Try looking on the web for some tips on flash, there's lots of flash tuts here on NG.
So, nice try for a first attempt!