A little help.

[Dave]

I see you have rounded the stache, that's one big problem I had, and yeah that lightsource is not matching at all with the hat, I mean the hat is ok, but the nose and the stache are kind of off...
I'll see if I can fix that.

Edit.

Here, I edited just a little bit of the stache (some colors) And I rounded the hat as well and I recolored some features in the glasses and the nose.
And added some stuff in the glases (The curverd end)