Nice character. Very appealing.
Here's what I see:
I think the basic anatomy is a bit goofed. I understand it's a cartoon style, but the face is distorted oddly.
The eyes are roughly 3/4 view. The nose is almost profile, with one nostril (our left) shoved far away from the rest of the face. The mouth is pulled far back the other way, and it is not under any part of the nose. The chin is pulled back with the mouth, away from the center of the face.
I think the nose tip needs to be redone and pulled back towards the center, and the nostril should be aligned to the inner edge of the eyeball. Then the mouth needs to move to our right so it sits under the nose. This may require adding to the far jawline a bit too.
The eyes are very large, which is fine. They are also bright white, which makes them pop out a bit. The eye sockets, particularly around the inner eye on our left (his right) are minimal or non-existent. The whole thing looks a little like a muppet with ping-pong ball eyes. Maybe that is the intent.
I think you could enhance the eye socket a bit and the pop-eye effect would be reduced. Maybe shade the eyeball a bit more too, but that could be tricky with the large eye and limited colors.
There's a dark blue patch on his cheek. It's unclear what this is, I'm guessing it's a sideburn of some sort?
Oh, and happy birthday!
Tourist