After sticking with the same handful of languages for years, I decided to learn C.

I've written a guess the number game, where it generates a random number based on the difficulty level, and then you have 5 attempts of guessing the number.

If you guess incorrect, it will give you a clue by telling you if the answer is higher or lower than your last guess. I find the game to be pretty interactive, and wanted to get a code review to see how I could improve on it.

This is my first ever C program and I'm just looking to improve.

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

int generate_random_number(int min, int max) {
    srand ( time(NULL) );
    return min + (rand() % (max - min));
}

void play() {

    int difficulty = 1; // 1 = easy, 2 = medium, 3 = hard, 4 = insane

    printf("1 = EASY, 2 = MEDIUM, 3 = HARD, & 4 = INSANE\n");
    printf("What level would you like to play: ");

    scanf("%i", &difficulty);

    int min = 0;
    int max = 0;
    int random = 0;

    if (difficulty == 1) {
        min = 0;
        max = 25;

        printf("You have selected to play easy\n\n");
    }
    else if (difficulty == 2) {
        min = 0;
        max = 50;

        printf("You have selected to play medium\n\n");
    }
    else if (difficulty == 3) {
        min = 0;
        max = 75;

        printf("You have selected to play hard\n\n");
    }
    else if (difficulty == 4) {
        min = 0;
        max = 100;

        printf("You have selected to play insane\n\n");
    }

    random = generate_random_number(min, max);

    int tries = 5;
    int won = 0;

    while (tries > 0)
    {
        int guess = 1000000; // just so it doesn't accidentally equal to random

        printf("Guess a number %i to %i: ", min, max);
        scanf("%i", &guess);

        if (guess == random) {
            won = 1;
            break;
        }
        else {
            if (guess > random) {
                printf("Incorrect guess, the answer is lower than your guess!\n\n");
            }
            else {
                printf("Incorrect guess, the answer is higher than your guess!\n\n");
            }
        }

        tries -= 1;
    }

    if (won) {
        printf("Congratulations, you have won the game!");
    }
    else {
        printf("Sorry, you are out of tries.\n\n");
    }
}

int main() {
    while (1) {
        play();
    }

    return 0;
}