Tap to start implementation

Hi, I'm trying to implement a tap to start feature for my game when it begins. The game itself uses touch for the actual game mechanics so it isn't unique to starting the game alone. My issue is, I can't seem to find a function that gets me the total number of taps that have occurred. I tried using while loops, to add up a counter, however my unity kept crashing I believe due to an infinite loop. My current code is as follows

 using UnityEngine;
 using System.Collections;
 
 public class ScoreManger : MonoBehaviour {
 
     public static int Score = 0; 
     public GUISkin layout;
     bool gameStart;
 
 
     // Use this for initialization
     void Start () {
         gameStart = false;
         Time.timeScale = 0;
     }
 
     // Update is called once per frame
     void Update() {
 
     }
 
     void OnGUI () {
         GUI.skin = layout;
         if (Input.touchCount > 0) {// Someone has touched.
         
             gameStart = true; 
             Time.timeScale = 1;
             GUI.Label(new Rect(Screen.width / 2 - 90 - 12, 100, 100, 100), "" + Score); // Displays score counter.
         }
         else {     
            // gameStart is still false
            GUI.Label(new Rect(Screen.width / 2 - 50 - 12, 100, 100, 100), "Tap to Start");// Tap to Start
         }
 
 
         }
     
 }

Currently inside my if statements I'm using input.touchCount which gives me the current amount of fingers touching the screen not the total amount so far which is what I thought it was. I'm not too sure how to proceed with fixing it.