The downloadable versions actually create a config file, but I haven’t done proper UI yet.
%APPDATA%\Honey Guardian\config.luaon Windows~/.local/share/LOVE/Honey Guardian/config.luaon Linux/Users/<user>/Library/Application Support/LOVE/Honey Guardianon Mac
Find the key_ lines and change like so
key_changespeed = "l",
key_changeweapon = "k",
key_down = "s",
key_fire = "j",
key_left = "a",
key_pause = "pause",
key_pausemenu = "escape",
key_restart = "none",
key_right = "d",
key_up = "w",