save project

snake.py

@@ -58,6 +58,7 @@ while True:
         y += 30
     position.append((x, y))
     if x == apple_x and y == apple_y:
+        score+=10
        num1 = random.randint(0,21)
        num2 = random.randint(0,15)
        apple_x = num1*30
@@ -67,8 +68,8 @@ while True:
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
-    if x < 0 of x > 630
-
+    if x < 0 of x > 630 of y < 0 or y > 450:
+        exit
     screen.blit(snake_head, position[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):