Added a bunch of stuff

Assets/Scripts/GameController.cs

@@ -1,11 +1,38 @@
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
+using UnityEngine.UI;
+using UnityEngine.SceneManagement;
 
 public class GameController : MonoBehaviour {
+	public Text timerText;
+	public Text scoreText;
+
+	void Awake() {
+		PersistentData.timer = 60;
+		PersistentData.score = 0;
+
+		StartCoroutine (DecreaseTick ());
+	}
+
 	void Update() {
 		if (Input.GetButtonDown ("Quit")) {
 			Application.Quit ();
 		}
+
+		if (PersistentData.timer <= 0) {
+			SceneManager.LoadScene ("gameover");
+		}
+
+		//update the texts
+		timerText.text = "Time Remaining: " + PersistentData.timer;
+		scoreText.text = "Score: " + PersistentData.score;
+	}
+
+	IEnumerator DecreaseTick() {
+		while (PersistentData.timer > 0) {
+			yield return new WaitForSeconds (1);
+			PersistentData.timer -= 1;
+		}
 	}
 }