Rating is wrong.

You can change the rating down from A. The "Adult" rating is really only for images that depict genitalia, gore, or extremely sexual images.
This is a figure image that actually doesn't show any naughty bits. Not offensive at all! And it does matter what the rating is, since the art portal has "A" rated images hidden by default, so many people might not see this, and a lot of other people expect "A" images to be porn, so people who come in here might get upset that it isn't sexy and rate it down. That's probably why it has a low rating as is.
Anyways, on to the painting. For something you painted in 5 minutes, this is actually very impressive. The colors used give it such a pop and are quite pleasing, and the lighting is rather good for a speed paint, and I like the few little areas that have hatching. I think that it could have been a far more refined work, though, had you spent just 5 or 10 more minutes on it, with a slightly neater outcome.
It's a good painting nonetheless, and impressive for the short time spent making it.