Here, we will create ways for the player to interact with the game world. For our game, we will have the player shooting their gun, collecting potions, and pausing the game as interactions. Create a new C# script and name it PlayerInteraction. First, we will create a couple of variables and add them to our script:

public GameObject Projectile, Potion;

The Projectile GameObject will be the bullets that we shoot and the Potion GameObject will be the potion prefab that we created earlier.

void Update ()
{
if(Time.tmeScale != 0.00f)
{
  if(Input.GetButtonUp("Fire1"))
    Instantiate(Projectile, transform.position, transform.rotation);

  if(Input.GetButtonUp("Esc_Key"))
  {
    if(Time.timeScale != 0.00f)
      Time.timeScale = 0.00f;
    else
      Time.timeScale = 1.00f;
  }
}
}