I have no criticism to give because it is just too awesome. My favourite part is the lip-syncing of the voice lines.

You could definitely use a symbolism for cash, instead of cash itself. Stuff like gold, a piggy bank, a sack of money. If I was going to put this on a kickstarter page, I would definitely make it bigger, to be more noticeable. I'll try and make a mock-up if I have time, but looking great so far!

I would definitely recommend you embed the video, upload it as a moving .gif, or upload it as a still .png. Seeing only links will often make people leave because they don't see anything right away.

As for the main menu, looking great! It moves a tad too much, though. So I had limited opportunities to study it closely, and also because I couldn't zoom in on a video. In light of this, I would really recommend uploading individual assets from the main menu as still .png's, so that anyone could look at them closer and properly.

Working on the mouth now. Had to move the right eye (our right) a pixel to the left because it looked weird.

You should add more distinction to your colours. As right now, the hair reads to me as one single color, and the outline of the mouth is not visible, more contrast would easily remedy this. The form of the character seems to be okay now, colors seem to be your current issue. You could the same colours for the eyes and the belly-shirt, as they are both green.

edit: also, I don't know if anyone has addressed this, but were you paid for this? A commission is something you were paid to do.

Your objects lack shape and shading. Establish a light source and shade according to where the light is coming from. Right now, everything looks flat and dull.