Hi Jonathan , i couldn't see if the button script was included , so i copyed your into mono but got compile error.
I ran unity debugger and got name space error what am i doing wrong heres c/p of c# script.
using UnityEngine;
using System.Collections;
public class buttons : MonoBehaviour {
public void PlayButton (int scene)
{
Application.LoadLevel (scene);
}
public void ExitButton ()
{
Application.Quit ();
}
}