@eroxx Recalbox was developed to play with joystick, to deliver an experience as close as possible to the original, we recommend using a keyboard only in computer games, which the keyboard was originally used for.
@zing thanks i found how to fix it. I can't update the recalbox on my arcade machine (that's the first thing i did when i received it and it buggued and couldn't reuse the sd card).
I just needed to go in controller and choose the input of each remote. It was really simple.