Crash and Restart

Part of the Building Real Games section of Coddy's Unity journey. Lesson 31 of 56.

Challenge

Medium

A crash ends the run, and a button starts the next one. Keep everything from the earlier lessons. The canvas has a hidden GameOverPanel with a RestartButton labelled Run again, and the scene fills two new fields of GameManager, gameOverPanel and restartButton. The Runner has a kinematic Rigidbody, so it gets trigger messages from the obstacles.

In GameManager:

Above the class, declare public enum GameState { Playing, GameOver }, and give the class a field public GameState state that starts as Playing.
Add using UnityEngine.UI;, using UnityEngine.SceneManagement;, public GameObject gameOverPanel; and public Button restartButton;.
A public method GameOver() sets state to GameOver, sets speed to 0, which stops every obstacle, and shows the panel.
Update() does nothing unless the state is Playing, so the speed and the distance stop.
In Start(), make restartButton reload the scene that is playing.

In Runner: when it enters a trigger tagged Obstacle, call GameManager.Instance.GameOver(). While the state is not Playing, the arrows do nothing.

In Spawner: spawn nothing while the state is not Playing.

Press Play, crash, and run again, then Check.

Try it yourself

using UnityEngine;
using TMPro;

public class GameManager : MonoBehaviour
{
    public static GameManager Instance;

    public float speed = 10f;
    public float speedUp = 0.5f;
    public float maxSpeed = 20f;
    public TMP_Text distanceText;
    private float distance;

    void Awake()
    {
        Instance = this;
    }

    void Update()
    {
        speed = Mathf.Min(speed + speedUp * Time.deltaTime, maxSpeed);
        distance += speed * Time.deltaTime;
        distanceText.text = "Distance: " + Mathf.FloorToInt(distance) + " m";
    }
}