Nice progress Lillycat. Like Randis said the background element at the moment can be improved to show a sense of depth.
Right now it looks more of a simple backdrop. ^^; Can't help but seeing your latest progress give me Frank Frazetta vibes. Maybe its the colour palette choice. Just for reference I attach a work from Frank Frazetta. See how he handle the background and noticed that they converge to two different vanishing point.
Lastly save the darkest black for at the last stage of painting.