Roxy, the Lizard

My animation is called "Roxy, the Curious Lizard".  I really like how my lizard turned out. I didn't think it would be that good. When my lizard's tommy growls, I like the sound and the movement. When the fly is in the picture and then leave he moves the leaf.
I would like to fix the length of my animation. At the end there is 30 seconds that just has sound and no animation. When I go into iMoive it doesn't show up. In the beginning, the tree moves.