Unity Game Development: Projectile Launching and Animal Management Scripts

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ProjectileLauncher : MonoBehaviour
{
    [SerializeField]
    private Rigidbody projectileRigidBody;
    [SerializeField]
    private float projectilePower = 1500;
    [SerializeField]
    private GameObject muzzle;

    [SerializeField]
    private float COOLDOWN_TIME = 0.5f;
    private float coolDown = 0;

    // Start is called before the first frame update 
    void Start() {}

    // Update is called once per frame 
    void Update()
    {
        if (coolDown <= 0)
        {
            if (Input.GetButtonUp("Fire1"))
            {
                coolDown = COOLDOWN_TIME;

                // Instantiate the projectile. 
                Rigidbody aInstance = Instantiate(projectileRigidBody,
                        muzzle.transform.position, transform.rotation) as Rigidbody;

                // Add force. 
                Vector3 forward = transform.TransformDirection(Vector3.forward);
                aInstance.AddForce(forward * projectilePower);

                // Destroy the object after X seconds. 
                Destroy(aInstance.gameObject, 8);
            }
        }
        else
        {
            coolDown -= Time.deltaTime;
        }
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class AnimalManager : MonoBehaviour
{
    [SerializeField]
    private string animalName = "Lion";
    private bool timeOn = false;
    private float countDown = 0;
    private Vector3 home = new Vector3();
    private GameObject player;
    private float currentSpeed = 3;
    private Animator anim;
    AnimatorStateInfo currentStateInfo;
    private int walkHash = Animator.StringToHash("Walk");

    // Start is called before the first frame update 
    void Start()
    {
        home = transform.position;
        home.y += 1;

        player = GameObject.FindWithTag("Player");
        anim = GetComponent<Animator>();

        timeOn = true;
        countDown = Random.Range(1.0f, 6.0f);
        currentSpeed = Random.Range(2.0f, 12.0f);
    }

    // Update is called once per frame 
    void Update()
    {
        if (timeOn)
        {
            countDown -= Time.deltaTime;
            if (countDown <= 0)
            {
                timeOn = false;
                transform.position = home;
            }
            else
            {
                return;
            }
        }

        AnimalWalk();
    }

    private void AnimalWalk()
    {
        Vector3 direction = player.transform.position - transform.position;
        direction.y = 0;
        float distance = direction.magnitude;

        if (direction.magnitude > 0)
        {
            Quaternion rotation = Quaternion.LookRotation(direction, Vector3.up);
            transform.rotation = rotation;
        }

        Vector3 normDirection = direction / distance;
        anim.SetInteger(walkHash, 1);

        currentStateInfo = anim.GetCurrentAnimatorStateInfo(0);
        if (currentStateInfo.IsName(animalName + "Walk"))
        {
            transform.position += normDirection * currentSpeed * Time.deltaTime;
        }
    }

    void OnCollisionEnter(Collision collision)
    {
        if (collision.gameObject.tag.Equals("Sphere"))
        {
            Destroy(collision.gameObject);
            transform.position = new Vector3(0, -1000, 0);

            timeOn = true;
            countDown = Random.Range(2.0f, 8.0f);
            currentSpeed = Random.Range(2.0f, 12.0f);
        }
    }
}