This shows a lot of promise, though for me it fell flat with the sound. I dunno, the animation was great, but the production on the voice work and lack of any sound effects other than the gun firing and burning sound (if it was burning, or was it meant to be them swimming?) of the island as they left (as they're flapping about in water) left it feeling quite empty for me.

As a demo and pitching tool it works well, but if you're looking for things to improve or tweak for further releases I'd start with the sound - I think a little more effort with it would boost the overall flow of this significantly.