Hey, I fix the D-PAD and the Minus, in the main.c : (sorry for my english it's not my native langage)
#define GPAD_BUTTON_A 0
#define GPAD_BUTTON_B 1
#define GPAD_BUTTON_X 2
#define GPAD_BUTTON_Y 3
#define GPAD_BUTTON_START 4
#define GPAD_BUTTON_SELECT 5 <- Add
#define GPAD_BUTTON_L1 6...