用Pygame做一个2048

好的，下面是一个简单的2048游戏的Pygame实现：

import pygame
import random

# 初始化Pygame
pygame.init()

# 游戏面板大小
BOARD_SIZE = (400, 400)

# 方格大小
CELL_SIZE = 100

# 游戏面板背景颜色
BACKGROUND_COLOR = (187, 173, 160)

# 方格颜色
CELL_COLORS = {
    2: (238, 228, 218),
    4: (237, 224, 200),
    8: (242, 177, 121),
    16: (245, 149, 99),
    32: (246, 124, 95),
    64: (246, 94, 59),
    128: (237, 207, 114),
    256: (237, 204, 97),
    512: (237, 200, 80),
    1024: (237, 197, 63),
    2048: (237, 194, 46),
}

# 字体颜色
FONT_COLOR = (255, 255, 255)

# 字体大小
FONT_SIZE = 40

# 创建游戏面板
screen = pygame.display.set_mode(BOARD_SIZE)

# 设置游戏标题
pygame.display.set_caption('2048')

# 创建字体对象
font = pygame.font.SysFont('Arial', FONT_SIZE)

# 生成方格矩阵
board = [[0 for x in range(4)] for y in range(4)]


def draw_board():
    """
    绘制游戏面板和方格
    """
    screen.fill(BACKGROUND_COLOR)

    for y in range(4):
        for x in range(4):
            value = board[y][x]
            color = CELL_COLORS.get(value, (205, 193, 180))

            rect = pygame.Rect(x * CELL_SIZE, y * CELL_SIZE, CELL_SIZE, CELL_SIZE)
            pygame.draw.rect(screen, color, rect)

            if value:
                text = font.render(str(value), True, FONT_COLOR)
                text_rect = text.get_rect(center=rect.center)
                screen.blit(text, text_rect)


def add_random():
    """
    在空位置随机添加数字2或4
    """
    x = random.randint(0, 3)
    y = random.randint(0, 3)

    while board[y][x] != 0:
        x = random.randint(0, 3)
        y = random.randint(0, 3)

    board[y][x] = random.choice([2, 4])


def merge(row):
    """
    将一行中的方格向左合并
    """
    i = 0

    while i < len(row) - 1:
        if row[i] == row[i + 1]:
            row[i] *= 2
            row[i + 1] = 0
        i += 1

    return row


def move_left():
    """
    将所有方格向左移动并合并
    """
    global board

    new_board = []

    for row in board:
        new_row = [x for x in row if x != 0]
        new_row += [0] * (4 - len(new_row))
        new_row = merge(new_row)
        new_board.append(new_row)

    if board != new_board:
        board = new_board