It's far to work but I've decided to show you current status of character selector:
Captura de pantalla - 110912 - 21:06:33.png
It doesn't allow to select any yet, but it shows all characters you have in the sprites subdirectory and renders them. The glitches in the background are because it's animated.

Note that I'm using these characters for testing only, because I didn't find more and I haven't time to create new ones.