Hello this is Gulshan Negi

Well, I am writing a program for making Hangman  Game in Python but it shows some error at the time of its execution.

Here is my source code: 

import random
import time
import os


def play_again():
  question = 'Do You want to play again? y = yes, n = no \n'
  play_game = input(question)
  while play_game.lower() not in ['y', 'n']:
      play_game = input(question)

  if play_game.lower() == 'y':
      return True
  else:
      return False


def hangman(word):
  display = '_' * len(word)
  count = 0
  limit = 5
  letters = list(word)
  guessed = []
  while count < limit:
      guess = input(f'Hangman Word: {display} Enter your guess: \n').strip()
      while len(guess) == 0 or len(guess) > 1:
          print('Invalid input. Enter a single letter\n')
          guess = input(
              f'Hangman Word: {display} Enter your guess: \n').strip()

      if guess in guessed:
          print('Oops! You already tried that guess, try again!\n')
          continue

      if guess in letters:
          letters.remove(guess)
          index = word.find(guess)
          display = display[:index] + guess + display[index + 1:]

      else:
          guessed.append(guess)
          count += 1
          if count == 1:
              time.sleep(1)
              print('   _____ \n'
                    '  |      \n'
                    '  |      \n'
                    '  |      \n'
                    '  |      \n'
                    '  |      \n'
                    '  |      \n'
                    '__|__\n')
              print(f'Wrong guess: {limit - count} guesses remaining\n')

          elif count == 2:
              time.sleep(1)
              print('   _____ \n'
                    '  |     | \n'
                    '  |     | \n'
                    '  |      \n'
                    '  |      \n'
                    '  |      \n'
                    '  |      \n'
                    '__|__\n')
              print(f'Wrong guess: {limit - count} guesses remaining\n')

          elif count == 3:
              time.sleep(1)
              print('   _____ \n'
                    '  |     | \n'
                    '  |     | \n'
                    '  |     | \n'
                    '  |      \n'
                    '  |      \n'
                    '  |      \n'
                    '__|__\n')
              print(f'Wrong guess: {limit - count} guesses remaining\n')

          elif count == 4:
              time.sleep(1)
              print('   _____ \n'
                    '  |     | \n'
                    '  |     | \n'
                    '  |     | \n'
                    '  |     O \n'
                    '  |      \n'
                    '  |      \n'
                    '__|__\n')
              print(f'Wrong guess: {limit - count} guesses remaining\n')

          elif count == 5:
              time.sleep(1)
              print('   _____ \n'
                    '  |     | \n'
                    '  |     | \n'
                    '  |     | \n'
                    '  |     O \n'
                    '  |    /|\ \n'
                    '  |    / \ \n'
                    '__|__\n')
              print('Wrong guess. You\'ve been hanged!!!\n')
              print(f'The word was: {word}')

      if display == word:
          print(f'Congrats! You have guessed the word \'{word}\' correctly!')
          break


def play_hangman():
   print('\nWelcome to Hangman\n')
   name = input('Enter your name: ')
   print(f'Hello {name}! Best of Luck!')
   time.sleep(1)
   print('The game is about to start!\nLet\'s play Hangman!')
   time.sleep(1)
   os.system('cls' if os.name == 'nt' else 'clear')

   words_to_guess = [
       'january', 'border', 'image', 'film', 'promise', 'kids',
       'lungs', 'doll', 'rhyme', 'damage', 'plants', 'hello', 'world'
   ]
   play = True:
   while play:
       word = random.choice(words_to_guess)
       hangman(word)
       play = play_again()

   print('Thanks For Playing! We expect you back again!')
   exit()


if __name__ == '__main__':
  play_hangman()

Well, I also checked and took a reference from here. Can anyone give their suggestions on this?

Thanks