the shadow is going the opposite direction of the cactus. i think that takes a lot away from the piece. i really dig this though. the cactus is great.

makes me wanna say BRRRRRRRRRRRRRRRRRRRRRR! great look

Too much dither!  Too much dither! 

 dude, you've got my vote.. this is so cool (literally... :P)

Funny cactus! Stylish, everything says its  col around it, so i think colors are good and enough too...

I work with acrylics, oils, inks ... but
This technique (pixelart) is new for me ... I want to start with few colors.

I don't understand why you used so few colours. The limit was 16. Are you trying to emulate a style?

I like the technique of color... reminds screentone)) 

Very nice, I assume this is a contest entry. Poor cactus.