生成了固定敌人并添加碰撞监测重置位置，后置了BGM循环播放

page/page.py

@@ -77,7 +77,16 @@ while running:
         # 填充窗口颜色
     screen.fill((255, 255, 255))
 
-    # 绘制矩形
+    # 绘制矩形(移动体和固定体)
     dirty = pygame.draw.rect(screen, BLUE, [dirty_x, dirty_y, 20, 30])
+    enemy = pygame.draw.rect(screen, RED, [40, 60, 10, 10])
+
+    # 碰撞监测
+    if dirty.colliderect(enemy):
+        print("die")
+        dirty_x = 400
+        dirty_y = 300
+        dirty = pygame.draw.rect(screen, BLUE, [dirty_x, dirty_y, 20, 30])
+
     pygame.display.update()
 pygame.quit()