Hey I have been working on this mockup for my first game ever... I wanted it to have that NES retro feel and right now I am trying to make a bare tree and I am not having a good time with it lol. This is my first time ever pixelling so if anyone could critique me and give me some pointers that would be awesome thanks!

Looks great! but yeah, the colours were much more limited on the NES. Pixel Pig agrees:

Edited by technos - 20 August 2012 at 10:07am

So i finished creating the outline of the bare tree but I have no clue how to shade it can someone help me :(

I'd say you have a good start here. The ground looks fine, so you don't need to work on that.

The tree itself looks good, but the color is too dark and is barely visible. It's a nice tree, and you want people to be able to see it ;).

I would suggest to remove the blue and purple from the moon, as it doesn't really do anything and just adds unnecessary banding.

I would also work on the banding in the clouds, and the clouds seem a bit too small, too.

And the background is still quite bare, I would get creative and add more stuff like bushes, tombstones, fences, a mountain maybe, etc.

Since this is your first game, I would not worry about strict NES restrictions. It looks retro, in any case.

ut if you are interested in finding colors suitable for your palette that are NES only, check this out 

Here, maybe this quick edit will give you some ideas.