请用python写一个2048游戏

2048游戏是一款简单的数字拼图游戏，可以通过不断合并方块来获得更高的分数。写一个2048游戏的代码，需要用到一些基本的图形图像和交互技巧。

以下是一个简单的python代码实现：

import pygame
import random

# 设置窗口的大小和标题
width, height = 800, 800
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("2048 Game")

# 设置每个方块的大小和间距
block_size = 100
gap_size = 10

# 定义颜色
color_dict = {
    0: (255, 255, 255),
    2: (255, 255, 128),
    4: (255, 255, 0),
    8: (255, 128, 0),
    16: (255, 0, 0),
    32: (128, 0, 0),
    64: (0, 0, 255),
    128: (0, 255, 0),
    256: (0, 255, 255),
    512: (255, 0, 255),
    1024: (128, 128, 128),
    2048: (0, 0, 0)
}

# 初始化游戏数据
grid = [[0 for x in range(4)] for y in range(4)]
game_over = False

# 在随机的两个方格中生成数字2
start_tiles = 2
for i in range(start_tiles):
    x, y = random.randint(0, 3), random.randint(0, 3)
    while grid[x][y] != 0:
        x, y = random.randint(0, 3), random.randint(0, 3)
    grid[x][y] = 2

# 游戏主循环
running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # 绘制游戏背景
    screen.fill((255, 255, 255))

    # 绘制方格
    for row in range(4):
        for col in range(4):
            pygame.draw.rect(screen, color_dict[grid[row][col]], (col * block_size + gap_size, row * block_size + gap_size, block_size - gap_size, block_size - gap_size))

    #