Thanks for comments and advices everyone :)

 Nice Effect.

Very nice use of dithering

Wow, that's beautiful.

as said: to many colors but it looks awesome!

Looks great. I will try to imitate this.

Looks cool, but you should really try to work with fewer colors, because that's the only real problem with your sprites.

Thanks for your comments guys

This is very good, but like your other piece, far to many colors. This could probably be accomplished with less than half. Regardless, excellent work.

I think you should put something to the background or make it transparent.

Anyway it's a nice piece