The controls are bit stiff, but super atmospheric and chill. Awesome game.
I would suggest to make the player's movement instant and not having a physics, to avoid the "sliding" effect. It could be better for a platformer in which requires precise inputs.
I'm not sure how to do it in Godot, but in Unity there's GetAxisRaw function so the input will be either -1, 0, or 1, but not inbetween. I'm sure there's an equivalent on Godot.