PirateAI

if (target != null) {
    Stack<GameObject> path = DijkstraAlgorithm.Dijkstra (
        GameObject.FindGameObjectsWithTag ("Node"),
        gameObject.GetComponent<CurrentNode> ().currentNode,
        target.GetComponent<CurrentNode> ().currentNode);

    GameObject goal = path.Pop ();
    Debug.Log (goal);
    Vector3 goalPosition = goal.transform.position;
    Vector3 goalDirection = goalPosition - transform.position;

    if (transform.position.x < goalPosition.x) {
        transform.Translate (Vector3.right * speed * Time.deltaTime);
    }
    if (transform.position.y < goalPosition.y) {
        transform.Translate (Vector3.up * speed * Time.deltaTime);
    }
    if (transform.position.x > goalPosition.x) {
        transform.Translate (Vector3.left * speed * Time.deltaTime);
    }
    if (transform.position.y > goalPosition.y) {
        transform.Translate (Vector3.down * speed * Time.deltaTime);
    }
}