Tap/Touch to start level

Hello I want to implement tap to start the level on android. Here is my code couldn’t figure out whats wrong.

#pragma strict

function Start () {
	//Tap to start
	if(RuntimePlatform.Android) {
	Time.timeScale = 0;
	//render tap to start sprite
	renderer.enabled = true;
	
	if(Input.touchCount >= 1 && Input.GetTouch(0).phase == TouchPhase.Began) {
	
	Time.timeScale = 1;
	renderer.enabled = false;
	
	}


}
}

function Update () {

}

Well it depends, If you want it to be anywhere then just use

function Update ()
{
    if (Input.touchCount >= 1)
    {
        //Do something
    }
}

If you want it to be a specific part like lets say when you touch a graphic layer text or texture

function Update ()
{
    if (Input.touchCount > 0 )
    {
    	for(var i : int = 0; i< Input.touchCount;i++)
    	{
    		var touch : Touch = Input.GetTouch(i);
    		if(touch.phase == TouchPhase.Began && guiTexture.HitTest(touch.position))
    		{
    			guiTexture.enabled = false;
    			//Do Something
    		}			
    	}
    }
}

Else if you want to detect if it is in a quadrent of the scene then this
NOTE: this cehcks the top right quater of the screen
var areaToTouch : Rect;

function Update ()
{
	areaToTouch = Rect(Screen.width / 2, Screen.height / 2, Screen.height / 2, Screen.height / 2);
    if (Input.touchCount > 0 )
    {
    	for(var i : int = 0; i< Input.touchCount;i++)
    	{
    		var touch : Touch = Input.GetTouch(i);
    		if(touch.phase == TouchPhase.Began && areaToTouch.Contains(touch.position))
    		{
    			//Do Something
    			Debug.Log("Touch");
    		}
    	}
    }
}

Use tap checking in Update method. Here you check tap just one time. So you are too late when pressing tap.