Notes

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

public class PlayerControllerX : MonoBehaviour
{
private Rigidbody playerRb;
private float speed = 500;
private GameObject focalPoint;

public bool hasPowerup;
public GameObject powerupIndicator;
public int powerUpDuration = 5;

private float normalStrength = 10; // how hard to hit enemy without powerup
private float powerupStrength = 25; // how hard to hit enemy with powerup

void Start()
{
playerRb = GetComponent<Rigidbody>();
focalPoint = GameObject.Find("Focal Point");
}

void Update()
{
// Add force to player in direction of the focal point (and camera)
float verticalInput = Input.GetAxis("Vertical");
playerRb.AddForce(focalPoint.transform.forward * verticalInput * speed * Time.deltaTime);

// Set powerup indicator position to beneath player
powerupIndicator.transform.position = transform.position + new Vector3(0, -0.6f, 0);

}

// If Player collides with powerup, activate powerup
private void OnTriggerEnter(Collider other)
{
if (other.gameObject.CompareTag("Powerup"))
{
Destroy(other.gameObject);
hasPowerup = true;
powerupIndicator.SetActive(true);
}
}

// Coroutine to count down powerup duration
IEnumerator PowerupCooldown()
{

yield return new WaitForSeconds(powerUpDuration);
hasPowerup = false;
powerupIndicator.SetActive(false);
}

// If Player collides with enemy
private void OnCollisionEnter(Collision other)
{
if (other.gameObject.CompareTag("Enemy"))
{
Rigidbody enemyRigidbody = other.gameObject.GetComponent<Rigidbody>();
// Vector3 awayFromPlayer = transform.position - other.gameObject.transform.position;
Vector3 awayFromPlayer = other.gameObject.transform.position - transform.position;

if (hasPowerup) // if have powerup hit enemy with powerup force
{
enemyRigidbody.AddForce(awayFromPlayer * powerupStrength, ForceMode.Impulse);
}
else // if no powerup, hit enemy with normal strength
{
enemyRigidbody.AddForce(awayFromPlayer * normalStrength, ForceMode.Impulse);
}


}
}



}