My first if statement is going through but then the gui button doesn't work afterwards. Can anyone explain or solve it please(bool broke)?

 using UnityEngine;
 using System.Collections;
 
 public class shipStats : MonoBehaviour {
     
     public TwoDController twoD;
     public bullet bull;
     public saveLoad sL;
     public int damage = 0;
     public int hull = 0;
     public int gun = 0;
     public int aExp;
     public int level = 0;
     private bool useMoney = true;
     private bool useStuff = false;
     private bool maxLevel = false;
     public bool broke = false;
     public bool toUps;
     public string[] hullLevel = {"Iriduim Steel composite-$0","Meteoric Iron-$1000","Arudium-$2000"};
     public string[] gunType = {"Gunpowder-0","Incendiary-$500","Engery-$1000"};
     private float currency;
     
     // Use this for initialization
     void Start () {
         currency = twoD.money;
         aExp += twoD.eExp;
     }
     
     // Update is called once per frame
     void Update () {
         if(useMoney && useStuff){
             useMoney = !useMoney;
             useStuff = !useStuff;
         }
         switch(level){
         case 0:
             if(aExp >= 0)
                 level += 1;
             break;
         case 1:
             if(aExp >= 200)
                 level += 1;
             break;
         case 2:
             if(aExp >= 500)
                 level += 1;
             break;
         case 3:
             if(aExp >= 1000)
                 level += 1;
             break;
         case 4:
             maxLevel = true;
             break;
         }
     }
     
     void OnGUI () {
         GUI.TextField(new Rect(400f,0f,100f,50f),"Balance " + currency + ".");
         if(!toUps){
             if(GUI.Button(new Rect(Screen.width/4f,Screen.height/4f,100f,100f),"Upgrade")){
                 Debug.Log("Button clicked");
                 toUps = true;
             }
         }
         if(toUps) {
             GUILayout.BeginArea(new Rect(Screen.width/4f + 50f,Screen.height/2f,1024f,1024f));
             GUILayout.BeginVertical();
             useMoney = GUILayout.Toggle(useMoney,"Use Money for purchasing");
             useStuff = GUILayout.Toggle(useStuff,"Use stuff to upgarde");
             hull = GUILayout.Toolbar(hull,hullLevel,GUILayout.Width (700f));
             gun = GUILayout.Toolbar(gun,gunType,GUILayout.Width(700f));
             GUILayout.EndVertical();
             GUILayout.EndArea();
             if(GUI.Button(new Rect(0f,0f,100f,50f),"back")){
                 sL.saveData ();
                 toUps = !toUps;
             }
             if(maxLevel)
                 GUI.Label(new Rect(Screen.width/3f,Screen.height/2f,500f,200f),"Congrats you have gotten to the maxuim level at this time.");
         }
         if(GUI.changed){
             switch(hull){
             case 0:
                 if(currency >= 0f)
                     twoD.health = 1000;
                 else 
                     broke = true;
                 break;
             case 1:
                 if(currency >= 1000f)
                     twoD.health = 2000;
                 else
                     broke = true;
                 break;
             case 2:
                 if(currency >= 2000f)
                     twoD.health = 3000;
                 else
                     broke = true;
                 break;
             }
             switch(gun){
             case 0:
                 if(currency >= 0f)
                     bull.damage = 30;
                 else
                     broke = true;
                 break;
             case 1:
                 if(currency >= 500f)
                     bull.damage = 100;
                 else
                     broke = true;
                 break;
             case 2:
                 if(currency >= 1000f)
                     bull.damage = 200;
                 else
                     broke = true;
                 break;
             }
         }
         if(broke){
             if(GUI.Button(new Rect(Screen.width/2,Screen.height/2,200f,50f),"You can't afford this.")){
                 broke = !broke;
             }    
         }
     }
 }