PlayerPrefs for score in dynamically loaded levels - unity3d

Question

Im creating a brick breaker game in Unity with one scene called Game that loads every single level based on data received from a json file.
I.E :
Once all bricks are destroyed from 1 level, the second level is
loaded in the same scene, and so on.
Once you lose, a "Lose" scene is loaded with a "Play Again" button.
I'd like the high score information to be retained in the player prefs even after you press the "Play Again" button.
But I'm a bit confused to how this works. This is my code for score:
using UnityEngine;
using UnityEngine.UI;
public class Score : MonoBehaviour
{
public Text scoreText;
public Text highScoreText;
private int score;
private int highScore;
void Start()
{
score = 0;
GetHighScore();
}
void Update()
{
UpdateScore();
SetHighScore();
GetHighScore();
}
// TO UPDATE HIGH SCORE
void SetHighScore()
{
if (score > highScore)
{
PlayerPrefs.SetInt("HighScore", score);
}
}
void GetHighScore()
{
highScore = PlayerPrefs.GetInt("HighScore");
highScoreText.text = "High score: " + highScore;
}
// TO UPDATE HIGH SCORE
// TO UPDATE SCORE
public void AddPoints(int points)
{
score = score + points;
UpdateScore();
}
void UpdateScore()
{
scoreText.text = "score: " + score;
}
// TO UPDATE SCORE
}
So far the score updates fine, but nothing happens to the high score. Any help is appreciated!

Answer 1

This method here achives nothing
void GetHighScore()
{
PlayerPrefs.GetInt("HighScore");
}
It should be
void GetHighScore()
{
highScore = PlayerPrefs.GetInt("HighScore");
}
And i dont see the point in calling it every frame in Update. Call it once in Start
Also, you may want to update highScore in SetHighScore
if (score > highScore)
{
highScore = score;
PlayerPrefs.SetInt("HighScore", highScore);
highScoreText.text = "high score: " + highScore;
}