this is a pretty nice piece! the only critique I can give is that the eyes feel, "flat", in a sense. they don't really have a shine to them and are just a pure yellow. leaving some white or extremely light yellow in there as, "shine" could help, or maybe adding differing hues of yellow to shade. I can't give any specific advice, I don't work with markers, haha.

what I do like especially is how the piece is framed and is detailed, but not to the point where you have to legitimately study the picture.