Excellent! You've sure got the hang of splines. I'd like to see his brows less prominent at the top of his nose. You've made a good stab at the ears, but there's something off about the hole.....too big? Also, under his mouth I think there could be one or two less horizontal splines. You could use hooks to cut the number down.
Heck. here's some more.......abit more creasing at the side of his "nostril flares" and the brain area at the back of the head seem abit small (could come down more). Of course, I know you're going for a stylised look.