// Update is called once per frame
    void Update()
    {
        if (Input.GetKey(leftKey)) //move left
        {
            rb2d.AddForce(Vector2.left * forceMod);
        }

        if (Input.GetKey(rightKey))  //move right
        {
            rb2d.AddForce(Vector2.right * forceMod);
        }

        if (Input.GetKeyDown(KeyCode.Space))
        {
            attack.Fire(transform.position);
        }

        if (Input.GetKeyDown(KeyCode.C)) //change to CursedShield
        {
            Destroy(shield);
            shield = gameObject.AddComponent <CursedShield>();
        }
        else if (Input.GetKeyDown(KeyCode.H))   //change to HalfDamageShield
        {
            Destroy(shield);
            shield = gameObject.AddComponent <HalfDamageShield>();
        }
        else if (Input.GetKeyDown(KeyCode.B))   //change to BaseShield
        {
            Destroy(shield);
            shield = gameObject.AddComponent <BaseShield>();
        }
        else if (Input.GetKeyDown(KeyCode.Q))
        {
            Destroy(shield);
            shield = gameObject.AddComponent <AbsorbShield>();
        }
        else if (Input.GetKeyDown(KeyCode.T))
        {
            Destroy(shield);
            shield = gameObject.AddComponent <TeleportShield>();
        }

        healthText.text = "Health: " + health;                   //update health display

        if (shield != null)                                      // if you have a shield
        {
            healthText.text += "\nShield: " + shield.ToString(); //update health display to show shield name
        }
    }