The saturation of color is much better now! If you still have the twigs I would keep looking at the shading and what you could do to enhance your twigs roundness. The part of the twig that is exposed on the bottom left still reads flat and could use some more shading. I would also look at the shading where the twigs cross each other. I think instead of being straight, the shadows would actually curve and by doing that it would also help the twigs look more round. You are almost there!
Here is an updated version with a bit more shading and detail.
The saturation of color is much better now! If you still have the twigs I would keep looking at the shading and what you could do to enhance your twigs roundness. The part of the twig that is exposed on the bottom left still reads flat and could use some more shading. I would also look at the shading where the twigs cross each other. I think instead of being straight, the shadows would actually curve and by doing that it would also help the twigs look more round. You are almost there!
Great highlights!