Switch scenes problem with the canvas

Hi! Can anyone help me with the problems that I am facing while I am struggling to finish the design of my game please? I will add him/her on my credits! The game is a bowling. 1. How can I add an image "Game Over" in my scene through the code which counts the scores? The game stops when it completes the 10th box. 2. I created a capsule-player and a camera which follows the player. However the rotation doesn't apply to my player.

public class PlayerExploring : MonoBehaviour { public Transform player; public float moveSpeed;

 public Transform camPivot;
 public float turnSpeed;
 //public Vector3 offset;
 

 // Update is called once per frame
 void Update()
 {

     if (Input.GetKey(KeyCode.A))
     {
         player.Translate(Vector3.left *moveSpeed*Time.deltaTime);
     }

     if (Input.GetKey(KeyCode.D))
     {
         player.Translate(Vector3.right * moveSpeed * Time.deltaTime);
     }

     if (Input.GetKey(KeyCode.W))
     {
         player.Translate(Vector3.forward * moveSpeed * Time.deltaTime);
     }

     if (Input.GetKey(KeyCode.S))
     {
         player.Translate(Vector3.back * moveSpeed * Time.deltaTime);
     }

     //cam.LookAt(player);
     //cam.position = player.position + offset;

     
         camPivot.position = Vector3.MoveTowards(camPivot.position, player.position, moveSpeed * Time.deltaTime);
         camPivot.rotation = Quaternion.RotateTowards(camPivot.rotation, player.rotation, turnSpeed * Time.deltaTime);

         player.Rotate(Input.GetAxis("MouseX") * Vector3.up * turnSpeed);
     
 }

}

1. In scene 1, I have the start button. By clicking that, the game begins-moves to scene 2. The score board appears in white and the exit button doesn't appear!