Hi, @lilou_cormic.
Keyboard input with arrows is planned, I just haven't gotten around to it yet. The Unity editor captures the arrow keys, so it made my life simpler to use WASD; but then I forgot about the arrow keys, since most of my playtesters use gamepads that I provide in-person.
Thank you for the feedback, though!
EDIT: Forgot to mention, I have to ensure it works with the code that configures controls and displays them on-screen . So yes, doing it would be easily done, ensuring it works without surprises needs a bit of time.