I got the coolest Christmas present ever, and I am finally starting to do something with it!!!

#include <LCDi2cW.h>

#include <WString.h>
#include <Wire.h>

// Doing something slightly useful with the Aduino and my web4robot i2c LCD and 4x4 keypad
// Ken Terrell

#define VERSION "1.2"

#define KEYPAD_BUTTON_1     1
#define KEYPAD_BUTTON_2     2
#define KEYPAD_BUTTON_3     3
#define KEYPAD_BUTTON_A     4
#define KEYPAD_BUTTON_4     5
#define KEYPAD_BUTTON_5     6
#define KEYPAD_BUTTON_6     7
#define KEYPAD_BUTTON_B     8
#define KEYPAD_BUTTON_7     9
#define KEYPAD_BUTTON_8     10
#define KEYPAD_BUTTON_9     11
#define KEYPAD_BUTTON_C     12
#define KEYPAD_BUTTON_STAR  13
#define KEYPAD_BUTTON_0     14
#define KEYPAD_BUTTON_POUND 15
#define KEYPAD_BUTTON_D     16

#define maxLength  8

#define BACKLIGHT  100
#define CONTRAST   50

LCDi2cW lcd = LCDi2cW(4,20,0x4C,0);             // Number of lines and i2c address of the display
 
int Backlight = 0x40;
int Contrast = 0x16;
char SecretCode[] = "1234";
String Guess = String(maxLength);
char charGuess;
int keyInput = 0;
int ledPin = 12;

void setup()
{
  Serial.begin(9600);
  Serial.print("Secret Code Box v");
  Serial.println(VERSION);
  Serial.println("");
  Serial.println("Written by Ken Terrell");
  Serial.println("");

  lcd.init();  // Init the display, clears the display
  lcd.home();
  lcd.clear();
 // delay(50);
  lcd.setBacklight(BACKLIGHT);
//  delay(50);
  lcd.setContrast(CONTRAST);
  pinMode(ledPin, OUTPUT);
  
  setkeypadmode(0);
  resetAll();
  splashscreen();
  mainscreen();
}


void loop()
{
//  charGuess = processKey(); //Get a keypress from the keypad if one is available.

Serial.print("Guess = ");
Serial.println(charGuess);
  if (processKey()) // We got one.
  {
    if (charGuess == 'A')
    { // End of Input, Check Results. Celebrate. Reset. and Redraw main screen.
      if(checkResults()) //checkResults is TRUE if you guessed the secret.
      {
        celebrate();
      }
      resetAll();
      mainscreen();
    }
    else if (Guess.length() < maxLength){
      Guess.concat(charGuess);
      lcd.setCursor(2,Guess.length());
      lcd.print("*");
    }

    while(processKey()) //Now we need to spin our wheels while until the user releases the key.
    { // do nothing in here just waiting on the user.
//       delay(400); // if we need to throttle back the i2c bus usage.
    }
  }
delay(400);
}

int checkResults() //return a 1 if correct, a 0 if incorrect.
{
  lcd.cursor_off();
  lcd.blink_off();
  lcd.clear();
  lcd.print("Your Guess was :");
  lcd.setCursor(1,0);
  lcd.print(Guess);
  lcd.setCursor(2,0);
  if (Guess.equals(SecretCode)){
    lcd.print("Congrats!");
    return(1);
  }
  else {
    lcd.print("Bummer....");
    delay(3000);
    return(0);
  }
}

void celebrate()
{
  for (int i=0; i<10; i++)
  {
    digitalWrite(ledPin, LOW);
    lcd.setBacklight(255);
    digitalWrite(ledPin, HIGH);
    lcd.setBacklight(0);
  }
}

void resetAll() //clear all strings and reset settings back to normal.
{
  Guess = NULL;
  digitalWrite(ledPin, LOW);
  lcd.setBacklight(BACKLIGHT);
  lcd.cursor_off();
  lcd.blink_off();
}  

char processKey() // read character from keypad translate to correct letter and return it.
{
  char pressed;

  int localkey;
  localkey=lcd.keypad();
  switch(localkey){
  case KEYPAD_BUTTON_1:
    pressed = '1';
    break;
  case KEYPAD_BUTTON_2:
    pressed = '2';
    break;
  case KEYPAD_BUTTON_3:
    pressed = '3';
    break;
  case KEYPAD_BUTTON_4:
    pressed = '4';
    break;
  case KEYPAD_BUTTON_5:
    pressed = '5';
    break;
  case KEYPAD_BUTTON_6:
    pressed = '6';
    break;
  case KEYPAD_BUTTON_7:
    pressed = '7';
    break;
  case KEYPAD_BUTTON_8:
    pressed = '8';
    break;
  case KEYPAD_BUTTON_9:
    pressed = '9';
    break;
  case KEYPAD_BUTTON_0:
    pressed = '0';
    break;
  case KEYPAD_BUTTON_A:
    pressed = 'A';
    break;
  case KEYPAD_BUTTON_B:
    pressed = 'B';
    break;
  case KEYPAD_BUTTON_C:
    pressed = 'C';
    break;
  case KEYPAD_BUTTON_D:
    pressed = 'D';
    break;
  case KEYPAD_BUTTON_STAR:
    pressed = '*';
    break;
  case KEYPAD_BUTTON_POUND:
    pressed = '#';
    break;
  }
  return(pressed);
}

int setkeypadmode(int keypadmode) {
//  lcd.keypadMode(keypadmode);
  delay(2);
}

void splashscreen() {
  lcd.setCursor(0,2);
  lcd.print("Keypad Ver ");             // Show Version
  lcd.print(VERSION);
  lcd.setCursor(3,0);
  lcd.print("www.bloomingfool.net");
  lcd.setCursor(1,4);
  lcd.print("Ken Terrell");
  delay(8000);
  lcd.clear();
}

void mainscreen() {
  beeper();
  lcd.clear();
  lcd.print("Enter the Secret!");
  lcd.setCursor(1,0);
  lcd.print("Then press 'A'.");
  lcd.setCursor(2,0);
  lcd.print("> ");
  lcd.cursor_on();
  lcd.blink_on();
  lcd.setCursor(2,1);
}

void beeper()
{
  digitalWrite(ledPin, HIGH);
  delay(50);
  digitalWrite(ledPin, LOW);
  delay(50);
}