Destroyer.cs

using UnityEngine;
using System.Collections;
using UnityEngine.SceneManagement;

public class Destroyer : MonoBehaviour
{
    public GameObject player;
    public GameObject player2;

    void OnTriggerEnter2D(Collider2D other)
    {
        //if the object that triggered the event is tagged player
        if (other.tag == "Player1" && player2 == null)
        {
            SceneManager.LoadScene(2);
        }

        else if (other.tag == "Player2" && player == null)
        {
            SceneManager.LoadScene(2);
        }

        if (other.gameObject.transform.parent)
        {
            Destroy(other.gameObject.transform.parent.gameObject);

        }
        else
        {
            Destroy(other.gameObject);
        }
    }

}

Since my game is an infinite-runner, and there is a camera moving along at a set pace, I had to make two rectangular colliders which used this script to destroy any objects they ran into. This would destroy game objects if they left the screen area, so that there wouldn't be too many objects cluttering the game memory, and making so that the players couldn't fall behind and expect to live. In addition, if a player fell onto a destroyer, and the other player was also dead, the game would go to the "GameOver" screen.