As a fellow n00b developer (my crap port y/day ) Look in the c files for SDLK and something after it. Run xev on the device and see which button does what and map that to the right button in http://www.libsdl.org/cgi/docwiki.cgi/SDLKey and change in the code. Like middle dpad button= return (xev) = SDLK_RETURN Full screen button at top = F6 (xev return value) = SDLK_F6