I need some help with my Code since I can’t find any solution. I’m fairly new to programming especially with GDScript and I’m trying to implement an easy and basic Follow AI Enemy but I can’t find any good Scripts because every other is in Godot 3. In Godot 3 we could use the move_and_slide with arguments likemove_and_slide(direction * speed) but now we can’t and I can’t find a solution, here my Code:

extends CharacterBody2D

const speed = 35
var dir: Vector2

var isBatChase: bool 

var player_position
var target_position

@onready var player = get_parent().get_node("CharacterBody2D")

func _physics_process(delta):
    player_position = player.position
    target_position = (player_position - position).normalized()

func _ready():
    isBatChase = true

func _process(delta):
    move(delta)
    handleAnimation()

func move(delta):
    if isBatChase == true:
        if position.distance_to(player_position) > 1:
            velocity = position.direction_to(player_position) * speed * delta
    if isBatChase == false:
        velocity += dir * speed * delta
    move_and_slide()

func _on_direction_timer_timeout():
    $DirectionTimer.wait_time = choose([1.0, 1.5, 2.0])
    if isBatChase == false:
        dir = choose([Vector2.RIGHT, Vector2.LEFT, Vector2.UP, Vector2.DOWN])

func handleAnimation():
    var animatedSprite = $AnimatedSprite2D
    animatedSprite.play("flying")
    if dir.x == 1:
        animatedSprite.flip_h = true
    elif dir.x == -1:
        animatedSprite.flip_h = false
    
func choose(array):
    array.shuffle()
    return array.front()

enter image description here
That is my Scene