NOT THE DEV, although I believe he's staying in line with the style of the game. A LOT of older style games used Arrows for aiming, I believe the dev did that in order to make it fit that style as well.
part of the reason, but the main reason is because when i tried to code in mouse movement it was completely bugged -w-
maybe I'll try to get mouse camera movement again one day, but for now it works well enough 😅