hi. most of batocera users come from brazil. Welcome.
tests are always welcome, however, i'm accumulating things to fix/make better.
a theme for the saturn is missing if you know paint shop.
most of work is not developping but more compilation/system configuration, but generally, it's almost the same people.
An other way to contribute is to answer to people on irc/forum.
Making video/tutorials is an other way to contribute. I could make a video section if you're interested in doing videos/tutorials (in english)
do you have the gamecube controller bug ? some people can't control the gamecube, i guess there is a bug in the way i generate the configuration file, but i can't find somebody having the bug now.