save project

snake.py

@@ -63,7 +63,7 @@ while True:
     else:
         position.pop(0)
     if x < 0 or x > 630 or y < 0 or y >450: 
-        exie()
+        exit()
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
@@ -79,4 +79,4 @@ while True:
     screen.blit(text, (540, 10))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(3)
+    FPSCLOCK.tick(10)