The (pink/red) shading looks wierd, do you see the sharp line between the green and the red color? You have to have a red-green mix color in between the two colors!
Unless it's not supposed to be a shading, just a two-coloured monster
pray tell, what is that?
Sad, more like shocked/ paranoid, unless its just used as a title and is irrelevant to its/ his expression. I'm not gonna point anything else out since you already stated that it was rushed.