If you don't mind me making an edit, I think adding a brow might help to make the eyes stand out more.
Also, a couple of other observations I had:
The dithering on the pants seems a bit too extreme - it makes them look like the texture of wood. Also, the shading on the hair and shirt is not very noticable from afar. Adding more contrast, removing the dithering and using hue shift might help create a better pallette.
Also, a couple of other observations I had:
The dithering on the pants seems a bit too extreme - it makes them look like the texture of wood. Also, the shading on the hair and shirt is not very noticable from afar. Adding more contrast, removing the dithering and using hue shift might help create a better pallette.