Python Letter Game

import os
import random
import sys

words = [
    'apple',
    'lemon',
    'pineapple',
    'banna',
    'strawberry',
    'grapefruit',
    'snikcers',
    ]
def clear():
    if os.name == 'nt':
        os.system(cls)
    else:
        os.system('clear')

def draw(secretWord, goodGuesses, wrongGuesses):
    clear()
    print('Strikes: {}/7'.format(len(wrongGuesses)))
    print('')
    for letter in wrongGuesses:
        print(letter, end=' ')
    print('\n\n')

    for letter in secretWord:
        if letter in goodGuesses:
            print(letter, end='')
        else:
            print('_', end='')
    print('')

def getGuess(wrongGuesses, goodGuesses):
    while True:
        guess = input("Guess a letter: ").lower()
        if len(guess) !=1:
            print ("you can only guess a single letter!")
            continue
        elif guess in wrongGuesses or guess in goodGuesses:
            print("you've already guessed that stuff!")
        elif not guess.isalpha():
            print("You can only guess letters!")
            continue
        else:
            return guess

def play(done):
    clear()
    secretWord = random.choice(words)
    wrongGuesses = []
    goodGuesses = []

    while True:
        draw(secretWord, goodGuesses, wrongGuesses)
        guess = getGuess(wrongGuesses, goodGuesses)

        if guess in secretWord:
            goodGuesses.append(guess)
            found = True
            for letter in secretWord:
                if letter not in goodGuesses:
                    found = False
            if found:
                print("You win!")
                print("The secret word was {}.".format(secretWord))
        else:
            wrongGuesses.append(guess)
            if len(wrongGuesses) == 7:
                draw(secretWord, goodGuesses, wrongGuesses)
                print("You lost!")
                print("The secret word was {}".format(secretWord))
                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 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)