Bool stuck as true through scenes.

Ok so the main part of this script is supposed to do the following: if the player clicks on a cube and the players coin count >= to the amount of coins the cubes costs then it will set isPurchased = 1 (true). But if I set a cubes bool in the inspector to 0 and then go to the main menu and return to that scene it's back to true (1). So it's basically defaulting to false. Please find out why.
using UnityEngine;

using System.Collections;


public class RedButton : MonoBehaviour {

public int pointsToAdd;

public int isPurchased;

public int pointsToSubtract;

public Texture textureToChangeTo;

int zero;


void Start () {


isPurchased = PlayerPrefs.GetInt ("purchase");


ScoreManager.score = PlayerPrefs.GetInt ("CurrentScore");

zero = 0;

}





public void OnMouseDown()

{

if (isPurchased == 0 && ScoreManager.score >= pointsToSubtract) {

ScoreManager.score -= pointsToSubtract;



PlayerPrefs.SetInt ("CurrentScore", ScoreManager.score);


PlayerPrefs.SetInt ("purchase", 1);

isPurchased = PlayerPrefs.GetInt ("purchase");

Debug.Log ("You purchased a thingy");





} else if (isPurchased == 1) {

Debug.Log ("You have already purchased this thing");

ScoreManager.score += zero;

} else if (PlayerPrefs.GetInt ("purchase") == 0 && ScoreManager.score < pointsToSubtract)


Debug.Log ("not enough coins");







}


}

 

Please edit your post and put the code in [ CODE][ /CODE] tags (without the spaces) and formatted/indented properly - It's just too difficult to read otherwise.

 

The Start() method is reading the value from the PlayerPrefs, which are persistent between sessions. So regardless of how the value is set in the inspector, the value gets overwritten on start up everytime, depending on what value was saved into PlayerPrefs.

Also, larku is correct: please use code tags when posting code or people will most likely ignore your question.