If they're going to all be used in the same game, then the shading and colors should be consistent from one to the next. The far right badguy has a lighter outline than the other characters. His background hand is also flat shaded while the other bad-guy has lighter shades on that hand. The guy on the left is standing in a similar pose as the other two, but I can't see his far arm the way I can see them on the bad guys. I'm gonna guess that the guy on the far right isn't quite finished yet, since he's missing some shading that the other one has as well.
As far as style goes, the human character and the two enemies seem to be done in different styles, almost as thought they were drawn by two different people. The enemies have really exaggerated proportions and those legs that taper to points. The human is less exaggerated and overall is less stylized than the enemies. It might just be personal preference on my part, but the difference in styles is pretty jarring to me. The proportions look off to me as well - for the record - but the colors look alright. The shading could use some love, tho. It looks like the light is coming from just to the left of the 'camera', but there's some conflict in the way the character's shaded. The arms seem to indicate light from slightly above, but the highlights suggest it's slightly below. Both the heaviest shaded parts AND the highlighted parts are towards the back of the arm which suggests light coming from both the left and the right of the camera. The other areas seem to be pretty much in agreement that the light is slightly above and to the left of the camera.
The bird, however, is lit from the right, and the highlights on the character's hair also indicates a light source to the right. If the bird is going to be on the character like that often, I'd recommend they both get the same light source so they don't clash with each other.
The 'old' character you have in that image looks a LOT better. It has better proportion/anatomy and perspective and is more interesting to look at... I don't think either of them really 'fits' the goblins, tho.