Keeps track of the player's score and updates a score text UI element.

ScoreManager.cs

using UnityEngine;
using UnityEngine.UI;

/// <summary>
/// Keeps track of the player's score and updates a score text UI element.
///
/// This script can be used to centralize the game's score logic, making it easier to maintain and update.
///
/// To use the score manager, simply attach this script to a game object in your scene
/// and assign the score text UI element to the `scoreText` public property.
///
/// To add points to the player's score, call the `AddScore()` method. The score text UI element will be
/// automatically updated with the current score.
/// </summary>
public class ScoreManager : MonoBehaviour
{
    /// <summary>
    /// The score text UI element.
    /// </summary>
    public Text scoreText;

    /// <summary>
    /// The player's current score.
    /// </summary>
    private int score;

    /// <summary>
    /// Initializes the score to 0.
    /// </summary>
    void Start()
    {
        score = 0;
        UpdateScoreText();
    }

    /// <summary>
    /// Adds points to the score.
    /// </summary>
    /// <param name="points">The number of points to add.</param>
    public void AddScore(int points)
    {
        score += points;
        UpdateScoreText();
    }

    /// <summary>
    /// Updates the score text UI element with the current score.
    /// </summary>
    void UpdateScoreText()
    {
        scoreText.text = "Score: " + score.ToString();
    }
}