@Pixel-Voxel: Your needlemouse sprite is nice, but the shading on it is very... inconsistent, and the highlight in his head feels just misplaced.
You see, the sprite's light source implies to be coming from the top right, so it would be more natural if the highlight was placed somewhere more on the top or around the forehead. Still on the shading, his hand, body and shoes need to get a fix in their shading as well, to stay consistent to where the light is coming from. Since Needlemouse is a very simple design, this is not something hard to think over. Think of it like how you would shade a sphere, or any other basic shape with depth.
I also recommend you apply more contrast to the colors of your sprite. Right now, there isn't much difference between the shaded and bright colors in the sprite, so you might want to make the shading on it darker. One thing I also noted is that your sprite is quite... outline-y, so I recommend you try to break the outline on it a little, it would give more of an anti-aliased impression to it, even with just few colors.
You see, the sprite's light source implies to be coming from the top right, so it would be more natural if the highlight was placed somewhere more on the top or around the forehead. Still on the shading, his hand, body and shoes need to get a fix in their shading as well, to stay consistent to where the light is coming from. Since Needlemouse is a very simple design, this is not something hard to think over. Think of it like how you would shade a sphere, or any other basic shape with depth.
I also recommend you apply more contrast to the colors of your sprite. Right now, there isn't much difference between the shaded and bright colors in the sprite, so you might want to make the shading on it darker. One thing I also noted is that your sprite is quite... outline-y, so I recommend you try to break the outline on it a little, it would give more of an anti-aliased impression to it, even with just few colors.