@CELS: Thank you for your comment and for pointing out the things that can be fixed. I struggled quite a bit with this one but perhaps I will be able to find the time to edit it later.

Good job with this. I like the colours and the candle glow especially. A few things strike me as odd though:
1) The shape of the skull. The nasal cavity and mouth don't seem to be pointing in the same direction as the eyes. The angle is odd. The jaw is very small.
2) The angle of the candle implies a side view, yet the skull and the floor suggests a top-down view. If we're seeing this from the top, then the candle should be positioned more towards the center of the object, and we should see the top of the candle. If it's a side view, then the shadow on the floor would be a lot flatter.
3) You've added a lot of light to the bottom ridge of the eye sockets, but I don't see how the candle would light those from its position. Even if it tid, there would certainly be a lot more light hitting the top of the brow and the bone above the nasal cavity.