请问大佬们，写好一个小游戏以后，该如何优化？

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#define _CRT_SECURE_NO_WARNINGS


int Menu()
{
    printf("***************************\n");
    printf("*********1.开始游戏********\n");
    printf("*********0.结束游戏********\n");
    printf("***************************\n");

    int giao = 0;
    system("color 0A");

    printf("请输入你的选项：");
    scanf("%d", &giao);

    return giao;
}

void Game()
{
    int one_number = rand () % 1000 + 1;

    while (1)
    {
        printf("请输入一个数[1-1000]：");
        int input_number = 0;

        scanf("%d", &input_number);

        if (input_number > one_number)
        {
            printf("数字大了！\n");
        }
        else if (input_number < one_number)
        {
            printf("数字小了！\n");
        }
        else
        {
            printf("恭喜你答对了！\n");
            break;
        }
    }
}

int main()
{
    srand((unsigned int)time(0));

    while (1)
    {
        int giao = Menu();
        if (giao == 1)    /*开始游戏*/
        {
            Game();
        }
        else if (giao == 0)
        {
            printf("Good bye!\n");
        }
        else
        {
            printf("请正确输入！！！\n");    /*int giao=Menu*/
        }
    }
    system("pause");
    return 0;
}