You really got me confused with the Yondaime part *points at 4th Hokage* XD
I love the way you did his eyes, the design is also really good, the colors on the swirls can also be found in the vector, so it's not too eccentric.

However, I think the swirls are too many. I like the idea with the circles in the left corner, maybe you could've replaced some swirls with that circles' brush and make some on his hair too, creating a decomposition effect. Except the abundance of swirls, I have no complaints, it looks really cool and it's a great tribute ;___;

Nice job,but I think there is too much swirls,as Sakura said...also the "4" is kinda hard to notice,and I think you should remove it or put it in the right part below his head...
Good job on the design though^^

I'll just say "wow" x]
nice design and amazing vector!