ScoreManager.cs

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class ScoreManager : MonoBehaviour {
	Text ScoreField;
	public int Score = 0;

	void Awake ()
	{
		ScoreField = GetComponent<Text>();
		Score = 0;
	}
	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
		ScoreField.text = "Score: " + Score;
	}
}