I can't get this letter game to work :(

import os
import random
import sys

# make a list of words
words = [
    'apple',
    'banana',
    'orange',
    'coconut',
    'strawberry',
    'lime',
    'grapefruit',
    'lemon',
    'blueberry',
    'melon'
]

def clear():
    if os.name == 'nt':
        os.system('cls')
    else:
        os.system('clear')


def draw(bad_guesses, good_guesses, secret_word):
    clear()

    print('Strikes: {}/7'.format(len(bad_guesses)))
    print('')

    for letter in bad_guesses:
        print(letter, end=' ')
    print('\n\n')
    # draw spaces # draw guessed letters and strikes
    for letter in secret_word:
        if letter in good_guesses:
            print(letter, end='')
        else:
            print('_', end='')

    print('')

def get_guess(bad_guesses, good_guesses):
    while True:
        guess = input("Guess a letter: ").lower()

        if len(guess) != 1:
            print("You can only guess a single letter!")
        elif guess in bad_guesses or guess in good_guesses:
            print("You've already guessed that letter!")
        elif not guess.isalpha():
            print("You can only guess letters!")
        else:
            return guess

def play(done):
    clear()
    secret_word = random.choice(words)
    bad_guesses = []
    good_guesses = []

    while True:
        draw(bad_guesses, good_guesses, secret_word)
        guess = get_guess(bad_guesses, good_guesses)

        if guess in secret_word:
            good_guesses.append(guess)
            found = True
            for letter in secret_word:
                if letter not in good_guesses:
                    found = False
                if found:
                    print("You win!")
                    print("The secret word was {}".format(secret_word))
                    done = True
                else:
                    bad_guesses.append(guess)
                    if len(bad_guesses) == 7:
                        draw(bad_guesses, good_guesses, secret_word)
                        print("You lost!")
                        print("The secret word was{}".format(secret_word))
                        done = True
                if done:
                    play_again = input("Play again? Y/n").lower()
                    if play_again != 'n':
                        return play(done=False)
                    else:
                        sys.exit()

def welcome():
    start = input("Press enter/return to start or Q to quit").lower()
    if start == 'q':
        print("Bye!")
        sys.exit()
    else:
        return True

print('Welcome to letter Guess!')

done = False

while True:
    clear()
    welcome()
    play(done)