下面是一个简单的示例代码，演示了如何使用pygame包创建一个表面边缘碰撞的游戏。

import pygame
import sys

pygame.init()

# 设置窗口大小和标题
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption("Surface Edge Collision")

# 加载图片
player_image = pygame.image.load("player.png")
player_rect = player_image.get_rect()
player_width = player_rect.width
player_height = player_rect.height
player_x = (screen_width - player_width) // 2
player_y = (screen_height - player_height) // 2

# 设置速度
player_speed = 5

while True:
    # 处理退出事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    # 获取键盘输入
    keys = pygame.key.get_pressed()

    # 移动玩家
    if keys[pygame.K_UP]:
        player_y -= player_speed
    if keys[pygame.K_DOWN]:
        player_y += player_speed
    if keys[pygame.K_LEFT]:
        player_x -= player_speed
    if keys[pygame.K_RIGHT]:
        player_x += player_speed

    # 边缘碰撞检测
    if player_x < 0:
        player_x = 0
    if player_x + player_width > screen_width:
        player_x = screen_width - player_width
    if player_y < 0:
        player_y = 0
    if player_y + player_height > screen_height:
        player_y = screen_height - player_height

    # 绘制画面
    screen.fill((0, 0, 0))
    screen.blit(player_image, (player_x, player_y))
    pygame.display.flip()

在这个示例中，我们使用pygame包创建了一个窗口，并加载了一个玩家的图片。玩家可以通过键盘输入上下左右键来移动。边缘碰撞检测部分会检测玩家是否超出了窗口边界，如果超出了边界则将玩家位置限制在边界范围内。

你可以将示例代码保存为一个.py文件，然后在同级目录下放置一个名为"player.png"的图片文件，运行代码即可看到效果。