Looks mostly good. Simple is better than over complicated clutter in my opinion, so I like the simplicity aspect of it. The extra lines under Naruto's chin kind of bother me though. Were those lines in the orginal art work that Kishimoto did? I don't quite remember, because I didn't like the original that much. I have 1 version of this saved on my computer, that the MH member/artist Joker-sai did. He either erased those lines, or they weren't there in the original. Either way I don't think they look good there, but as for the rest of your coloring, I think you did a good job. The soft shading looks really good this time around, so keep it up rss.