This is an amazing speed painting! I can't believe this only took an hour for you to do! I absolutely love the way you decided to do the colors. All the black really makes the lighter colors stand out and it gives it a really cool look. The black around the eyes also gives contrast to those and makes them stand out, as well. As you said in the description, the blending is a bit rough, but I actually like the look the rough blending gives the drawing. Sure it doesn't look smooth, but it gives it a really cool look that you wouldn't get if the blending was a little smoother. Overall, this is definitely one of the best speed paintings I've ever seen.
Your art work shows some progression you have to keep at it too get really very good, if you find an artist on here that you like don't be afraid to ask them for hints or tips, most will come back with practise makes perfect but to be honest that's how you get good, most of us aren't born with a natural gift for art, I sure as hell wasn't so practise is essential I did a tutorial piece on how I paint my pieces. These are good start points to get down important techniques that can help you in other area's. If you ever want any hints or tips then feel free to note me