better. upper left corner of animal still bugs me. Also, wrinkles shouldn't just be dark line. have bright bits next to it. also lips could have highlights to suggest wet.

Thanks for the critique guys. I have made some changes with shading.

noisy pillow shading

the shading makes the body look flat, the way its light in the middle and darker around the outlines.  A more directional light source could help.  Try to put some more time into this before the end of the week I think you can still improve it.

I'm not very fond of the shadow around the lips, but I love the way the claws on the ground look. Reminds me of Metroids. (Actually, the ones on the right seem a little oddly shaped.)

Wow, I like the texture on this one.