make a 2d grappling hook game in unity code example

Example: rope system for grappling hook game

// 1
public GameObject ropeHingeAnchor;
public DistanceJoint2D ropeJoint;
public Transform crosshair;
public SpriteRenderer crosshairSprite;
public PlayerMovement playerMovement;
private bool ropeAttached;
private Vector2 playerPosition;
private Rigidbody2D ropeHingeAnchorRb;
private SpriteRenderer ropeHingeAnchorSprite;

void Awake()
{
    // 2
    ropeJoint.enabled = false;
    playerPosition = transform.position;
    ropeHingeAnchorRb = ropeHingeAnchor.GetComponent<Rigidbody2D>();
    ropeHingeAnchorSprite = ropeHingeAnchor.GetComponent<SpriteRenderer>();
}

void Update()
{
    // 3
    var worldMousePosition =
        Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 0f));
    var facingDirection = worldMousePosition - transform.position;
    var aimAngle = Mathf.Atan2(facingDirection.y, facingDirection.x);
    if (aimAngle < 0f)
    {
        aimAngle = Mathf.PI * 2 + aimAngle;
    }

    // 4
    var aimDirection = Quaternion.Euler(0, 0, aimAngle * Mathf.Rad2Deg) * Vector2.right;
    // 5
    playerPosition = transform.position;

    // 6
    if (!ropeAttached)
    {
    }
    else
    {
    }
}