For a first, it's all right
Well, at least you tried to do something sensible. My first advice would be to tell us what we have to do. I clicked around randomly, and yay, something happened.
Second: draw! The cake was fully drawn, but everything else lines and sqares and such.
Third: make the animations a little slower, so we can follow what happens. Or decrease the fps. As the size of the file is quite small, the loading time is minimal. But a play button at the very first frame would be nice.
And my final word about the music: set it to loop some times, then play around a bit with starting and stopping it. Make a layer just for the sounds.
I hope you'll continue to have fun creating flashes.
Peace