Debugging Challenges

These are actually my last debugging challenges for this week. The first one had me moving a cube and having it increase and decrease in size. The second one has me shooting balls on a single click of the left mouse button.

{
    public float speed = 10f;
    public float GrowScale = 2f;
    public GameObject itemToSpawn;

    // Update is called once per frame
    void Update()
    {
        float xAxis = Input.GetAxis("Horizontal");
        float zAxis = Input.GetAxis("Vertical");

        transform.Translate(new Vector3(xAxis, 0f, zAxis) * speed * Time.deltaTime);

        if (Input.GetKeyDown(KeyCode.E))
        {
            transform.localScale = new Vector3(transform.localScale.x + GrowScale, transform.localScale.y + GrowScale, transform.localScale.z + GrowScale);
        }

        if (Input.GetKeyDown(KeyCode.Q))
        {
            transform.localScale = new Vector3(transform.localScale.x - GrowScale, transform.localScale.y - GrowScale, transform.localScale.z - GrowScale);
        }

        if (Input.GetMouseButtonDown(0))
        {
            Vector3 spawnLocation = new Vector3(transform.position.x, transform.position.y + 1f, transform.position.z + 1f);

            Instantiate(itemToSpawn, spawnLocation, Quaternion.identity);

        }
    }