Arduino LCD Timer Display

Question

I've been trying to make a timer with Arduino that will stop after 2 hours and make a buzzer go off. I've been succesful with getting the timer count seconds up, but now I've tried to make it display hours and minutes too & make buzzer go off, all help is appreciated, here is the code and picture of project:

#include <LiquidCrystal.h> 
LiquidCrystal lcd(1,2,4,5,6,7); // setup the lcd 
#define button 3
         // setup integers //
int timerMode=0;
int buzzer=8;
int wait=400;
int longWait=5000;
int startTime;
int hours=(millis() - startTime) / 360000;




void setup() {
lcd.begin(16,2); // start lcd //
lcd.clear();  // clear old text //
pinMode(button, INPUT_PULLUP); // make button an input //
pinMode(buzzer, OUTPUT); // make buzzer an output //
lcd.print("Ergo timer"); // print begin text //

 
}

void loop() {
lcd.setCursor(0,1);
if (digitalRead(button) == LOW){ // if button is pressed//
  startTime=millis();
  timerMode++;
  delay(wait);
}

if (timerMode==1){ // if timermode is 1 after a button press //
  lcd.setCursor(0,0);
  lcd.print("Over 2 uur pause"); // print top text //
  lcd.setCursor(0,5);
  lcd.print( (millis() - startTime) / 1000); // print time in seconds //
  lcd.setCursor(0,4);
  lcd.print(":"); // print a column between //
  lcd.setCursor(0,3);
  lcd.print( (millis() - startTime) / 60000); // print time in minutes //
  lcd.setCursor(0,2);
  lcd.print(":");
  lcd. setCursor(0,1);
  lcd.print( (millis() - startTime) / 360000); // print time in hours //
 

 }

  if (hours == 2){
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("---Nu pause---");
    tone(buzzer,200,1000);
    
   }

if (timerMode > 1){
  delay(longWait);
  timerMode=0;
  lcd.clear();
  lcd.print("---Ergo timer---");
 }