If you don't already know about this: wayofthepixel.net/pixelation is a great place to post works for CC. They are the best.

EDIT: http://imgur.com/2n3h2hW
I edited your image a bit (in the yellow square). At this size, above all else the goal is readability. Many of the details you added did not add much, and just read as noise. Also, you had a lightsource in the image. I love lightsources in the image because it gives the opportunity to do all kinds of atmospheric and mood-related things to the piece. The stalk of the lightsource in your was brighter than the lightsource itself.

thanks for the kind words.

@parker I myself think that i've made many mistakes in the piece. the shadows are falling weird i think. And the inner apple looks kinda like sticker, And of course the face issue too. But due to my lack of skill i don't know where to go to fix. So, I dare myself to submit it to get CC. Please don't hesitate to critique, i would like to learn.

And thanks for the welcome too...

This looks pretty good!

Really awesome concept. And well done overall.
A potential problem is, I was unable to tell they were worms to see their faces at 1x.

If you intend it to be viewed at a higher zoom, then that's fine. Because at 2x everything becomes clear.
Also welcome to the site. You look like you could make some great stuff.