Three things:

1. Great work
2. Some subtle animation on the giant illustrations would take it to the next level, visually speaking. Think rustling leaves, a bird that flys by every five seconds, something like that. Your illustration is really strong and somewhat whimsical so play around with it.
3. If you're using this to get work, or an internship, consider this: When I click through to Dribble from your portfolio it's taking me into a crowded marketplace full of other designers and reducing your impact to a 400x300 rectangle in the middle of this.

edit Meant for this to be a comment as opposed to a reply, whoops