Code

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

public class Hacker : MonoBehaviour

{
    // Game config
    string[] level1passwords = { "friend", "neighbor", "home", "password", "123", "qwerty" };
    string[] level2passwords = { "police", "law", "squadcar", "sergeant", "tazer", "donut" };
    string[] level3passwords = { "federal", "machinegun", "fbiopenup", "feds", "prison", "trouble" };

    // Game state
    int level;
    int CrackAttempts;
    enum Screen { MainMenu, Password, Win, EasterEgg };
    Screen currentScreen = Screen.MainMenu;
    string password;

    // Start is called before the first frame update

    void Start()
    {
        ShowMainMenu();
    }
    void ShowMainMenu()
    {
        Terminal.ClearScreen();
        Terminal.WriteLine("What would you like to hack into?");
        Terminal.WriteLine(" ");
        Terminal.WriteLine("Press 1 for your neighbors wifi.");
        Terminal.WriteLine("Press 2 for the local police station.");
        Terminal.WriteLine("Press 3 for the FBI.");
        Terminal.WriteLine(" ");
        Terminal.WriteLine("Please enter your selection:");
        currentScreen = Screen.MainMenu;
    }

    void OnUserInput (string input)
    {
        bool isValidLevelNumber = (input == "1" || input == "2" || input == "3");
        if (isValidLevelNumber)
        {
            level = int.Parse(input);
            StartGame();
        }

        if (input == "Menu")
        {
            ShowMainMenu();
            currentScreen = Screen.MainMenu;
        }

        else if (input == "Method0901")
        {
            Terminal.WriteLine("Follow Method0901 on twitch: twitch.tv/METHOD0901");
            currentScreen = Screen.EasterEgg;
        }

        else if (currentScreen == Screen.Password)
        {
            Password();
        }

        else
        {
            Terminal.WriteLine("Please make a valid selection.");
        }



        void StartGame ()
        {
            Terminal.ClearScreen();
            Terminal.WriteLine("You have chosen level " + level);
            Terminal.WriteLine(" ");
            Terminal.WriteLine("Input 'Menu' or a new level number to");
            Terminal.WriteLine("choose another level.");
            Terminal.WriteLine("Please enter the password:");
            currentScreen = Screen.Password;
        }

        switch (level)
        {
            case 1:
                password = level1passwords[3];
                level = 1;
                break;
            case 2:
                password = level2passwords[5];
                level = 2;
                break;
            case 3:
                password = level3passwords[2];
                level = 3;
                break;
        }

        void Password()
        {
            if (input == password)
            {
                Terminal.WriteLine("Password successfully cracked.");
            }
            else
            {
                Terminal.WriteLine(" ");
                Terminal.WriteLine("Password incorrect.");
                CrackAttempts += 1;
                Terminal.WriteLine("Failed cracking attempts: " + CrackAttempts);
                Terminal.WriteLine("Try again:");
            }
        }




    }





}