Not really, just pictures of ears, eyes, ect.
I did just notice that the eyes are a bit messed up, the pupils are really small compared to his actual eyeball. (Gonna edit this image a bit now.)
P.S. I attentionally made him look tired. (In the game he will be investigating a lab for days without sleep, you expect him not to be tired?) ;)
it's be best to use a reference of a whole head, so that you can see the relative sizes of things and specific planes of the face, rather than breaking it down into a few symbols -nose, mouth, eyes.