like Hi_Ho said i think your doing pretty good on the jolliness of the face, Eyes look as if they were painted on a flat place though,.
several things can effect the stern gaze in eyes,
focusing the pupil straight ahead is something you don't want necessarily in a charter.. unless you want the charter to be expressing a thought of "what now?" where the caricature is looking to you for an answer or understanding its situation...
if you don't get the pupils exactly right it will make a goggled eye charter and distract from the overall carving,
but if you turn the eyes a little off side center like the carter was distracted and glanced away, it helps., you still get the great eyes without the gazing stare,, which can be mistaken for mad or stern,,
eyebrows have a lot with the emotion shown through the eyes, the outside ends turned up can give a demonic look, with the ends down effect the same,, but the ends
Eyes, are difficult until you think of a cross section profile of what your trying to accomplish.
but its as hard to draw as it is to understand so i hope the point is reflected in the line on the left side of the image,,, attached,,,
Below is a side view cross section view in black on the left side of the image..
