@Mush: I understand what you're saying, but green's face is so busy I don't know where to put any more shading.
@TheChannel: I changed the shadows around green's eyes, but your bite seems a little too violent. I'm going for more of a gnawing. My fault though, I did name the thread Red bites Green.
@StaticSails: Those eyes are much better than mine. *yoink* But I don't want green to look like he's in pain; just uncomfortable and alarmed.
Here's my edit:
Things I changed:
implemented TheChannel's shading on green's eyes
changed the wrinkles on green's head(I'm afraid they might look more like cracks; they're supposed to be kinda stretch-ish)
changed red's eyes to look more like StaticSails's edit. also rearranged the face a little
changed red's teeth.
changed the darkest and lightest red colors(I think I still need to mess with the other colors some, but this is what I have for now.)
I'm afraid I might have lost some of the original crazyness I was going for with red. If I have enough fun with this I might animate it.