Dirty young man

First I will say that this is really well done.

Vision: You had a clear idea of what you wanted to draw and you drew it.

Originality: This is not fan art, and I do not think I have seen anyone else attempt a character like this one. The character design is well done, and likeable. Just from looking at this character the viewer can develop a story of this characters adventures.

Technique: First of all I really like the way you draw. Your cel shaded style is very clean. The light source is well established.

Your inking is well done. They way the outer lines are thicker than the lines inside is a great way to frame your character.

Your use of color is also balanced good.
Having the him wear green pants puts the color at the bottom of the picture and the green leaves in his hair put it at the top of the picture. This works great.

Here is where the points start to shave off. Just nit picking but I want to give you the best critique I can.

The shirt is still white, and the shades are grey. If you would have used a tint of brown to the shirt and shadows it could have really helped express how dirty he is. It would have also made his eyes and teeth the only white part of him. This would have made his bright lively smile and blue eyes the focus of the drawing.

Also the forearms are shaped different.

Impact: The picture over all works really well. If you would have did the things I mentioned before and added a background I think that would have really helped this picture stand out amongst your other great works.

I hope that helps.