Godot Follow Mouse

extends KinematicBody2D

export (int) var speed = 500

var target = Vector2()
var velocity = Vector2()

func _physics_process(delta):
    target = get_global_mouse_position()
    velocity = position.direction_to(target) * speed
    look_at(target)
    if position.distance_to(target) > 5:
        velocity = move_and_slide(velocity)