node-cli

#!/usr/bin/env node

import { Chalk } from 'chalk';
import clear from 'console-clear';
import readline from 'readline';

const chalk = new Chalk({ level: 3 });

const { log } = console;

const rl = readline.createInterface({ input: process.stdin, output: process.stdout });
const prompt = (query) => new Promise((resolve) => rl.question(query, resolve));

const CITY_MAX_HP = 15, MANTICORE_MAX_HP = 10;

const readInt = async (question) => prompt(question).then((value) => parseInt(value, 10));

const isMultipleOf = (n, m) => n % m === 0;

const calculateDamage = (n) =>
  isMultipleOf(n, 3) && isMultipleOf(n, 5)
    ? 10
    : isMultipleOf(n, 3) || isMultipleOf(n, 5)
      ? 3
      : 1;

const main = async () => {
  let round = 1, cityHp = CITY_MAX_HP, manticoreHp = MANTICORE_MAX_HP;

  clear();

  const distance = await readInt('Player 1, how far away from the city do you want to station the Manticore? ');
  clear();

  log('Player 2, it\'s your turn.');

  while (cityHp > 0 && manticoreHp > 0) {
    let damage = calculateDamage(round);

    log(chalk.yellow('-'.repeat(54)));
    log(chalk.reset.cyan([
      chalk.magenta.underline.bold('STATUS:'),
      `Round: ${chalk.yellow(round)}`,
      `City: ${chalk.green(`${cityHp}/${CITY_MAX_HP}`)}`,
      `Manticore: ${chalk.red(`${manticoreHp}/${MANTICORE_MAX_HP}`)}`
    ].join('  ')));
    log(`The cannon is expected to deal ${chalk.red(damage)} damage this round.`);

    const range = await readInt('Enter the desired cannon range: ');

    if (range === distance) {
      log('That round was a ' + chalk.reset.green.bold('DIRECT HIT') + '!');
      manticoreHp -= damage;
    } else {
      if (range < distance) {
        log('That round ' + chalk.reset.red.bold('FELL SHORT') + ' of the target.');
      } else {
        log('That round ' + chalk.reset.red.bold('OVERSHOT') + ' the target.');
      }
    }

    if (manticoreHp > 0) {
      cityHp--;
    }

    round++;
  }

  if (cityHp > 0) {
    log(chalk.reset.green.bold.underline('\nThe Manticore has been destroyed! The city has been saved!'));
  } else {
    log(chalk.reset.red.bold.underline('\nThe city has been destroyed!'));
  }

  rl.close();
};

(async () => {
  main();
})();

rl.on('close', () => process.exit(0));