Excellent
I thought the movie was fantastic, just the right length for these types of short films. The character work was very good, and the characters were believable (thought I couldn't help but staring at those TEETH haha).
This is one of my favorite types of animations to do, and I know the work that goes into this stuff. The next really cool thing you could do is to develop some really nice caricatures or models. You could use steel/wire bodies with clays etc on top. You could alternately fire your main parts and make multiples of each mouth and eye expression that can be attached.
Excellent work!