game manager add lives and score

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

public class GameManager : MonoBehaviour
{
    private int score = 0;
    private int lives = 10;

    void Start()
    {

    }

    void Update()
    {

    }

    //shows game over when lives = 0
    public void AddLives(int value)
    {
        lives += value;

        if (lives <= 0)
        {
            Debug.Log("Game Over");
            lives = 0;
        }
        Debug.Log("Lives =" + lives);
    }

    //adds score when player destroys animals
    public void AddScore(int value)
    {
        score += value;
        Debug.Log("Score =" + score);
    }
}