Build Your Own 2D Minecraft - A Game and Tutorial
I built a 2D Minecraft clone that runs entirely in the browser - no downloads, no installs, just a single HTML file with JavaScript and canvas rendering.
And, when I say “I built”, I mean “I used AI coding tools to build”. But the point was not to build a 2D Minecraft clone. The point was to build a set of interesting coding exercises, and to build it quickly. These coding tools are not just an opportunity to generate product; they’re an opportunity to learn, if you just take the time to ask.
In my opinion, “What” is interesting and often amazing, but is not as interesting as “How” or “Why”.
This game as procedurally generated terrain, mining, building, an inventory system, crafting, a day/night cycle, and more. All in about 800 lines of vanilla JavaScript.
The Tutorial
More fun than the game itself: I generated a 12-lesson tutorial that walks through building it from scratch, aimed at a fifth-grade reading level. Each lesson is a self-contained web page with live interactive demos embedded right in the page.
The lessons build progressively:
- Hello, Canvas! - HTML basics and drawing rectangles
- Colors & Shapes - Variables, functions, building a character
- The Animation Loop - The game loop and
requestAnimationFrame - Keyboard Controls - Event listeners and WASD movement
- Gravity & Jumping - Velocity, acceleration, physics
- A World of Blocks - 2D arrays and grid rendering
- Collision Detection - Player vs. block collision
- Scrolling Camera - Worlds bigger than the screen
- Breaking & Placing Blocks - Mouse input and world modification
- Inventory System - Collecting items and hotbar management
- World Generation - Noise functions and procedural terrain
- The Complete Game - Day/night, crafting, health, and polish
Every concept is explained with analogies a kid would understand (flip-books for animation, lockers for arrays, light switches for key tracking), and each lesson ends with challenges to encourage experimentation.