?? How to Play

?? Objective

Defend your factory from enemy bugs! Write Node.js code to attack them and earn XP!

Controls

Desktop: WASD or Arrow keys to move
Mobile: Use joystick (bottom-left)
CODE Button: Opens code challenge
LEARN Button: Shows lesson before challenge
REF Button: Quick reference guide
HELP Button: Shows tips

?? Learning Modes

Read Lesson: Understand the concept first
See Example: View working code
Multiple Choice: Easy mode for beginners
Write Code: Advanced mode

?? Combat

When enemies attack your buildings:

Red warning appears on screen
Click LEARN to understand the concept
Then click CODE to solve the challenge
Buildings lose HP if you're too slow

?? Node.js Quick Reference

Variables

const name = 'Tech';  // constant
let count = 10;        // can change
var old = 5;           // old style
            

??? Console Output

console.log('Hello');
console.error('Error!');
console.warn('Warning!');
            

?? Functions

function greet(name) {
  return 'Hello ' + name;
}

// Arrow function
const add = (a, b) => a + b;
            

?? Arrays

const arr = [1, 2, 3];
arr.push(4);           // add
arr.pop();             // remove last
arr.map(x => x * 2);  // transform
            

?? Objects

const user = {
  name: 'John',
  age: 25,
  greet() { return `Hi ${this.name}`; }
};
            

Modules

const fs = require('fs');
const path = require('path');
const http = require('http');
            

?? HTTP Server

const http = require('http');
const server = http.createServer((req, res) => {
  res.writeHead(200);
  res.end('Hello World');
});
server.listen(3000);
            

? Express.js

const express = require('express');
const app = express();

app.get('/', (req, res) => {
  res.send('Hello');
});

app.listen(3000);
            

? Async/Await

async function readData() {
  try {
    const data = await fs.readFile('file.txt');
    console.log(data);
  } catch(err) {
    console.error(err);
  }
}
            

? Database (MongoDB)

const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/mydb');

const User = mongoose.model('User', {
  name: String,
  email: String
});
            

FACTORY DESTROYED

Enemies Defeated: 0

Node.js Level: 1

Total XP: 0

Challenges Completed: 0

?? Node.js Factory Defense

?? ENEMY ATTACK!

FACTORY DESTROYED