Advertisement Sculpt needs critique

I started playing around with Shape Keys just to prove a concept and after seeing what Shape keys are capable off I created a File of 100+ Shape Keys that serves me for generating base meshes for cartoon face Sculpting.
I uploaded the file on Gumroad and I Uploaded also a (bad) Video on Youtoube. Now I uploaded a Demo sculpting on Blend Swap that should represent that capability of my file. And I want some critique about the cover and the demo file.

This is the file and sculpt for that i want Your Opinion:

This is the file on Gumroad that it advertises for:

and here is a youtoube demo of what it is all about: