Nice, but you could do better.
Here are a few tips:
1. The white eyes... Give them a red inner glow to make them look fiercer.
2. The shadow. It's too opaque. Use a solid-to-transparent gradient to get it right.
3. Save it as PNG, and not JPG to get a transparent background.
4. Aliasing. There are too many jagged edges. Make sure you have aliasing turned on for every tool you use.
5. Detail. From the picture above, it looks like you've not coloured his outfit right. Also, you haven't got the scabbard of his sword right.