hey sorry, i know you want the cartoon look, but i am a man/boy of realism, even though i fail at doing so, there are a couple of crits following realistic anatomy you may want to follow:
firstly, the nose looks painted on, i suggest remove those two lines to open up the 'bridge' of the nose more.
your chin doesnt have that much definition to it.
thats all i will crit on without going into the eyes