Nice! It even seems that the fire takes shape of the human blood vessels (or so it seems to me...)

 Awesome! I like how the flying sparkles turned out.

Although the female boobs are kind of flat and.. uhm.. square-ish? 

Great, I like the fire and figures.
Did you plan the overal layout from a t-shirt or you just pixeled the thing by restrictions? Just asking, because some use to plug their shirts into the trousers and then some details would be ruined.

I like this work. Overall look of the piece is very good. I especially like the meeting of the hands and the heads.

Fav'd!

 changed ! thanks

You can post it with the solid It's designed to be over a specific color, and it loses a lot when people see it using any non-dark theme of PJ.