PlayerController.cs

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

public class PlayerController : MonoBehaviour
{
    private Rigidbody playerRb;
    public GameObject focalPoint;
    public GameObject powerUpIndicator;


    [SerializeField] private float speed;
    [SerializeField] private bool hasPowerup;
    [SerializeField] private float powerupStrength; 
    // Start is called before the first frame update
    void Start()
    {
        playerRb = GetComponent<Rigidbody>();
    }

    // Update is called once per frame
    void Update()
    {
        float forwardInput = Input.GetAxis("Vertical");
        playerRb.AddForce(focalPoint.transform.forward * speed * forwardInput);
    }


    private void OnCollisionEnter(Collision collision)
    {
        if (collision.gameObject.CompareTag("Enemy") && hasPowerup)
        {
            Rigidbody enemyRb = collision.gameObject.GetComponent<Rigidbody>();
            Vector3 awayFromPlayer = (collision.gameObject.transform.position - transform.position).normalized;
            enemyRb.AddForce(awayFromPlayer * powerupStrength, ForceMode.Impulse);

        }
    }
    private void OnTriggerEnter(Collider other)
    {
        if (other.CompareTag("Powerup"))
        {
            hasPowerup = true;
            Destroy(other.gameObject);
            StartCoroutine(PowerupCountdownCoroutine());
            powerUpIndicator.SetActive(true);
        }
    }
    IEnumerator PowerupCountdownCoroutine()
    {
        yield return new WaitForSeconds(5);
        hasPowerup = false;
        powerUpIndicator.SetActive(false);
    }
}