Basic Hangman using Python

I've stopped programming in Python for a long time now, someone recommended to me that the best way to get into it is by trying to code a game of Hangman, and that's what I did. Or tried to, at least.

import random


class Game:
    def __init__(self, game_word):
        self.game_word = game_word


class Player:
    def __init__(self, guessed_word, guess_count, used_letters):
        self.guess_count = guess_count
        self.guessed_word = guessed_word
        self.used_letters = used_letters


def get_word():  # getting a word from a txt file with a list of single words
    word_file = open("words.txt")
    game_word = random.choice(word_file.readlines())
    game_word = game_word.strip().lower()
    word_file.close()
    return game_word


def user_guess(game, player):
    print("Enter a letter: ")
    letter = input().lower()
    if check_input(letter, player.used_letters) == 0:  # if check_input is 0 then there are no errors in player input
        if letter in game.game_word:  # determining if the guessed letter in the word
            for i in range(0, len(game.game_word)):
                if letter == game.game_word[i]:
                    player.guessed_word[i] = letter  # replacing the '-' in the player's "guessed_word" with the letter
            player.used_letters.append(letter)
        else:
            player.guess_count -= 1  # letter is not in the word, so player loses a life
            player.used_letters.append(letter)


def check_input(letter, used_letters):  # Just some error checking
    if letter in used_letters:
        print("Already guessed using this letter, try again with a different one!")
        return 1
    elif not letter.isalpha():
        print("Only alphabets allowed!")
        return 1
    elif len(letter) > 1:
        print("Only one character allowed per guess")
        return 1
    return 0


def game_round(game, player):
    print("".join(player.guessed_word))
    print("Letters used: " + " ".join(player.used_letters))
    print("Number of tries left: " + str(player.guess_count))
    user_guess(game, player)


def game_init():
    guessed_word = list()  # what the user guesses so far
    used_letters = list()  # used_letters will be used to store all the letters the player inputs throughout the game
    game_word = get_word()  # get a random word from a text file
    for i in range(len(game_word)):  # Print '-' for each letter in the word by default
        guessed_word.append("-")
    guess_count = int(input("Set the maximum number of guesses that you want\n"
                            "Number of guesses(lives): "))

    return Game(game_word), Player(guessed_word, guess_count, used_letters)


def end_condition(game, player):
    if "-" not in player.guessed_word:  # if there are no more '-' then it means the user guessed the whole word
        print("".join(player.guessed_word))
        print("Game won!")
        return True

    elif player.guess_count == 0:  # no more guesses remain
        print("The correct word is \'" + game.game_word + "\'")
        print("Game lost!")
        return True
    return False


def retry():
    choice = input("Would you like to play again? Press \'y\' to start over\nNew round: ")
    if choice == "y":
        return True
    return False


def main():
    input("Press \"Enter\" to start the game\n")
    while True:
        game, player = game_init()
        while True:
            game_round(game, player)  # player makes a guess
            if not end_condition(game, player):  # if game not over, player makes another guess
                continue
            break
        if retry():  # start new game
            continue
        break
    print("Game Over!")


if __name__ == "__main__":
    main()

I feel like this could be improved more since I've done a similar version where everything was in the main function, and it was half as long.

import random


def main():
    input("Press \"Enter\" to start the game\n")
    while True:
        word_file = open("words.txt")
        game_word = random.choice(word_file.readlines())
        game_word = game_word.strip().lower()
        word_file.close()
        guessed = list()
        used_letters = list()
        for i in range(len(game_word)):
            guessed.append("-")
        count = 10
        while True:
            print("".join(guessed))
            print("Letters used: " + " ".join(used_letters))
            print("Number of tries left: " + str(count))
            print("Enter a letter: ")
            letter = input().lower()
            if letter in used_letters:
                print("Already guessed using this letter, try again with a different one!")
                continue
            elif not letter.isalpha():
                print("Only alphabets allowed!")
                continue
            elif len(letter) > 1:
                print("Only one character allowed per guess")
                continue
            elif letter in game_word:
                for i in range(0, len(game_word)):
                    if letter == game_word[i]:
                        guessed[i] = letter
            else:
                count -= 1
            used_letters.append(letter)
            if "-" not in guessed:
                print("".join(guessed))
                print("Game won!")
                game_over = True
                break
            elif count == 0:
                print("The correct word is \'" + game_word + "\'")
                print("Game lost!")
                game_over = True
                break
        if game_over:
            choice = input("Would you like to play again? Press \'y\' to start over\nNew round: ")
            if choice == "y":
                continue
            else:
                break
    print("Game Over!")


if __name__ == "__main__":
    main()

The words text file. In case the link doesn't work, the text file is just single-words separated by a new line.