Glad I could help
I think you can still show cartoon emotions without adding lips and cutting the bottom part of the nose off though.
Heres an example(normal, surprised, sad...and very surprised at the bottom) -
And this is the same example again but with a pixel taken away from moustache(dont know if this was really needed but thought Id show it anyway) -
I dont see the point of using the pants colour for the eyebrows and bottom of the eyes because it really does look the same as black...especially when placed next to black. Unless your character is going to be really zoomed in and enlarged in your game, its not going to be a visible colour change from the black.
If you really want to use a different colour for eyebrows, I would suggest using the dark brown from his hair like in my example.
I dont think using the lip colour to shade the bruised nose really works either. Maybe try a different colour?
Well these are just my thoughts and hope it could help some.