simple UI added

Assets/Scripts/Score/ScoreService.cs

@@ -0,0 +1,35 @@
+using System;
+using Unity.VisualScripting;
+using UnityEngine;
+
+public class ScoreService
+{
+    public Action<int> onScoreUpdate;
+
+    public int score { get; private set; }
+    public int HighScore = PlayerPrefs.GetInt("HighScore", 0);
+
+    public void AddScore()
+    {
+        score += 5;
+        onScoreUpdate?.Invoke(score);
+        if(score>HighScore)
+        {
+            SetHighScore();
+        }
+        Debug.Log(score);
+    }
+
+    private void SetHighScore()
+    {
+        HighScore = score;
+        PlayerPrefs.SetInt("HighScore",HighScore);
+        PlayerPrefs.Save();
+    }
+
+    public int GetHighscore()
+    {
+        return PlayerPrefs.GetInt("HighScore",0);
+    }
+
+}