sixpointnine wrote:
As irukard said this is not very good, yet. But don't worry, here i will show you how to fix it.
Problem 1: the perspective.
The head is shown from the front, but the perspective ingame in diagonal from a 45° angle. That means that the top has to be visible and the lower side and the lines you drew horizontal have to be curved.

Problem 2: The black lines.
Only beginners add detail by adding black lines. Good pixel artist don't draw carvings and reliefs with lines but with light and shadow. When you got edges toward the light source, you make them brighter and when you got edges away from the light source you make them darker.

Problem 3: The lightning
You put some highlights to the lower parts, although it would be correct to put them in the upper parts. I already corrected this at the face parts in the last step. Now i fix the base and the main part:

Problem 4: The linear shading
The shading looks too regular giving it the look as if it were made of plastic. To make it look more stone-like you should use a technique called "dithering". It means that you expand every shading zone by springling the neighboring color zones with random pixels of its color. More at the border and the further you get into the other color the less pixels you place. This doesn't only make the color transitions more smooth but also give the surface a rough expression:
