I just toyed a bit with the tool and it's very responsive ... and I already have another request xD : it would be awesome if backgrounds were not mandatory. Unless I'm mistaken, I saw no option de "deactivate" the background. It would be cool to be able to have the character only without the bg.
Also, beside my request for african chars, it would be cool to be able to "ajust" the colors of current chars , actually this would be very useful for a more accurate "rendering".