save project

snake.py

@@ -66,6 +66,8 @@ while True:
     else:
         position.pop(0)
     position.append((x, y))
+    if x<0 or x>630 or y<0 or y>450:
+        exit()
     #position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
@@ -78,7 +80,7 @@ while True:
     # 将果实画上去
     screen.blit(food, (apple_x, apple_y))
     #绘制分数
-    info='Score'+str(score)
+    info='Score:'+str(score)
     text=my_font.render(info,True,(0,0,0))
     screen.blit(text,(540,10))
     # 刷新画面