python 猜大小小程序

import random

coins = 0
if coins < 5:
    print("金币不足请充值再玩！")
    while 1:
        money = int(input("请输入充值金额:"))
        if money%10==0:
            coins += money // 10 * 20
            print("充值成功!当前金币有{coins}".format(coins=coins))
            print("~~~~~~~~~开始游戏~~~~~~~~~~")
            answer = input("是否开始游戏(y/n)?")
            while coins>5 and answer == "y":
                coins -= 5
                coins += 1
                ran = random.randint(1,6)
                ran2 = random.randint(1,6)
                guess = input("请猜大小:")
                if guess == "大" and ran+ran2>6 or guess=="小" and ran+ran2 <=6:
                    print("恭喜你猜对了！")
                    coins += 2
                else:
                    print("猜错了！")
                answer = input("是否继续游戏(y/n)?")
            break
        else:
            print("不是10的倍数，充值失败！")