Godot 4 TDS Player move

extends CharacterBody2D
class_name Player

signal player_died

@export var speed = 1000
@export var acceleration = 0.1
@export var friction = 0.05

var direction = Vector2()

# TODO : Ajouter timer au jeu
var bullet_speed = 1000
var bullet = preload("res://Bullet.tscn")

func _physics_process(_delta):
    direction.x = Input.get_action_strength("right") - Input.get_action_strength("left")
    direction.y = Input.get_action_strength("down") - Input.get_action_strength("up")

    direction = direction.normalized()

    #look_at(get_global_mouse_position())

    #if (Input.is_action_just_pressed("fire")):
    #   fire()

    if (direction.length() > 0):
        velocity = velocity.lerp(direction * speed, acceleration)
    else :
        velocity = velocity.lerp(Vector2.ZERO, friction)

    move_and_slide()