save project

snake.py

@@ -65,6 +65,8 @@ while True:
     else:
         position.pop(0)
     # 将背景图画上去
+    if x<0 or x>630 or y<0 or y>450:
+        exit()
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
     screen.blit(snake_head, position[-1])
@@ -76,7 +78,7 @@ while True:
     screen.blit(food, (apple_x, apple_y))
     g='Score:'+str(score)
     text=word.render(g,True,(0,0,0))
-    screen.blit(text,(100,100))
+    screen.blit(text,(0,0))
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(3)
\ No newline at end of file