CliclerExample

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

public class CliclerExample : MonoBehaviour {

    bool doubleClick;
    int money;

    public Text moneyDisplay;
    public Button buttonBuyDoubleClick;

    void Start() {
        money = PlayerPrefs.GetInt("money", 0);
        moneyDisplay.text = money.ToString();

        doubleClick = PlayerPrefs.GetInt("doubleClick", 0) == 1;
        buttonBuyDoubleClick.interactable = !doubleClick;
    }

    public void BuyDoubleClick() {
        doubleClick = true;
        PlayerPrefs.SetInt("doubleClick", 1);
        buttonBuyDoubleClick.interactable = false;
        PlayerPrefs.Save();
    }

    public void Click() {
        if (doubleClick) {
            money += 2;
        } else {
            money++;
        }
        moneyDisplay.text = money.ToString();
        PlayerPrefs.SetInt("money", money);
        PlayerPrefs.Save();
    }

    public void ResetData() {
        PlayerPrefs.DeleteAll();
        money = 0;
        moneyDisplay.text = money.ToString();
        doubleClick = false;
        buttonBuyDoubleClick.interactable = true;
    }
}