Karting Microgame: Reset or StartRace?

@Tanoshimi2000 I know this post is over 3 months old.
However, I wanted to share my findings, just in case someone else comes here looking for the answer to this question.
It took me a few days to figure it all out, but basically the template was NOT designed for a Reset or Play Again, as this is just a tutorial template.

However, you can make it work. To make this happen, you have to have the following:

1. A way to know the game has ended, is over, has lost or Won!

2. TrackManager needs to StopRace, if the player never finished.

3. Make the game think you are displaying the Menu for the 1st time again.

4. Create a way to RESET the trackmanagers info for a new race.

5. Move the Kart back to the beginning spot.

6. Reset the RaceCountDown Trigger.

7. Create a way to RESET the Racers timer to zero.

8. Then relaunch the TriggerDirector.

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First you need to alter the "MetaGameController.cs" file.
Make sure you have all of these at the top:

 using KartGame.Track;
 using KartGame.Timeline;
 using KartGame.KartSystems;
 using UnityEngine;

Next, add these "public" items:

 [Tooltip("The TrackManager used in this game.")]
 public TrackManager tManager;  // Allows us to call functions on the TrackManager
 [Tooltip("A reference to the Kart")]
 [RequireInterface(typeof(IMovable))]
 public UnityEngine.Object iKart;  //Gives us a refernce to the Kart for movement and placement
 [Tooltip("A differnen type of reference to the Kart")]
 [RequireInterface(typeof(IRacer))]
 public Object initialRacer;   //Gives us a reference to each racers information, like timer

Also add these variable to the top, they do not have to be public.

 IMovable ikart;
 bool newGame = false;
 IRacer m_Racer;

Now, add this line to the void OnEnable() function:

 m_Racer = (IRacer)initialRacer;

Then, add this line to the void Start() function:

 ikart = (IMovable)iKart;

Also, you can remark the line //HandleMenuButton();
and the Menu will appear when you run the game instead of the game starting automatically!
Pressing the Escape key will "Unpause" and the game will start.

Next, you need to alter the HandleMenuButton() funtion so it looks just like this:

 void HandleMenuButton()
         {
             ToggleMainMenu(show: !m_ShowMainCanvas);
             Time.timeScale = m_ShowMainCanvas ? 0f : 1f;
 
             if (m_FirstTime)
             {
                 raceCountdownTrigger.TriggerDirector();
                 m_FirstTime = false;
             }
             if(newGame)
             {
                 tManager.SetForNewGame();  //sets variable back to beginning
                 tManager.ReplaceMovable(ikart);  //Moves cart back to last Checkpoint
                 raceCountdownTrigger.ResetTrigger();  //Resets the count down
                 m_Racer.ResetTimer(); //Resets the Racers Timer
                 raceCountdownTrigger.TriggerDirector();  //Launch Director
                 newGame = false;  // set to false now that a new game is running
             }
         }

So now, to solve #1, #2 & #3 from above, my karting game has a Gas Gauge that can run empty if you do not reach a fillup. This will cause the game to end by running a new function you need to add to the "MetaGameController.cs" file. In my game, it gets called by my Gas Gauge when it reaches EMPTY. You do not have to do it this way, but you will still need to call this script when your game ends.

 public void EndGame()
         {
             Debug.Log("End Of Game");
             tManager.StopRace(); 
             ToggleMainMenu(true);
             newGame = true;
             m_FirstTime = true;
         }

Now, save the MetaGameController.cs file, and go back in to Unity. Click on the MetaGameController item under the Hierarchy. Now, from under the Hierarchy, Drag the TrackManager over to the Inspector for the T Manager. Also, drag the Kart over to both the IKart and the Initial Racer.

This completes the changes to the MetaGameController

To Solve #4 & #5, we simply need to add a function to the TrackManger.cs file.
Open it, and add the following function:

 public void SetForNewGame()
 {
     m_RacerNextCheckpoints.Clear();
     Object[] allRacerArray = FindObjectsOfType<Object>().Where(x => x is IRacer).ToArray();
     IRacer racer = allRacerArray[0] as IRacer;
     m_RacerNextCheckpoints.Add(racer, checkpoints[1]);
 }

This completes the changes to the TrackManager

We already solved #6 when we altered the MetaGameController.cs file and added to the HandleMenuButton() function.
We just simply called the raceCountdownTrigger.ResetTrigger(); function.

Now, to solve #7, we need to alter 2 files. These will be the Racer.cs and the IRacer.cs.
First Open the IRacer.cs file, and add the following lines to the bottom:

 /// <summary>
 /// Resets the Race timer to Zero (0).
 /// </summary>
 void ResetTimer();

Save this file. Then open the Racer.cs file and add this PUBLIC function:

 public void ResetTimer()
 {
     m_Timer = 0f;
     int m_CurrentLap = 0;
     m_LapTimes = new List<float>(9);
 }

This completes the changes to the Racer and Iracer files

And lastly, #8 was already solved when we altered the HandleMenuButton(). we simply called the raceCountdownTrigger.TriggerDirector(); function.

So now, when your game ends, the main menu should appear, Hitting the Escape key should now initiate a NEW RACE by moving the Kart back to the Start Finish line, resetting all the check points and the timer.

I really hope this helps someone!