PowerUp.cs

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

public class PowerUp : MonoBehaviour
{
    public Text poweruptext;
    public Transform gunEnd;
    public GameObject shot;
    public float fireRate;

    

    private float nextFire;

    private Rigidbody2D rb;
    private int powerup;

    // Start is called before the first frame update
    void Start()
    {
        rb = GetComponent<Rigidbody2D>(); //gets the rigidbody 2d component
        powerup = 0; //sets poweup to 0
        Setpoweruptext();
       
    }

    void OnTriggerEnter2D(Collider2D other)
    {
        if (other.gameObject.CompareTag("Rocket") && powerup < 10) //checks if the tag of the object is rocket and checks if powerup is less than 10
        {
            other.gameObject.SetActive(false); //makes object disappear when player collides with object
            powerup = powerup + 5;
            Setpoweruptext(); //sets the object to false on collision and gives the player a powerup (rocket) and displays it on the text
            GetComponent<AudioSource>().Play();
        }
    }

    void Setpoweruptext()
    {
        poweruptext.text = "ROCKETS: " + powerup.ToString(); //displays text on the screen to whatever it tells us to display
    }

    void Update()
    {
        if (Input.GetButtonDown("Fire2") && Time.time > nextFire) //when the right button is clicked, a rocket is fired, and it subtracts the number of rocket the player has on the text
        {
            if (powerup >= 1) //checks if there is at least 1 rocket, otherwise command won't work
            {
                nextFire = Time.time + fireRate; //sets a fire rate
                Instantiate(shot, gunEnd.position, gunEnd.rotation);
                powerup = powerup - 1;
                poweruptext.text = "ROCKETS: " + powerup.ToString();
            }

        }
    }

}