Skip to main content
  1. Posts/

Pong in a Favicon

··228 words·2 mins·

A Classic Game in Your Browser Tab 🎮
#

This project showcases a fascinating implementation of Pong directly in your browser tab’s favicon. Amazing, right? Use your mouse scroll to move your paddle and play against the artificial intelligence.

The game uses a cleanly separated layered architecture:

  • Pure engine: No DOM, no canvas, no global dependencies.
  • Single rasterizer: Transforms the game state into a grid.
  • Multiple rendering surfaces: favicon, magnified view on the page, ASCII view in terminal.

💡 Explanation in a nutshell
#

Pong is a classic video game where two players control vertical paddles that bounce a ball back and forth. This project takes it to an ingenious extreme: it integrates the complete game into the favicon (that tiny icon you see in the browser tab).

The architecture is very clean thanks to separation of concerns:

  1. Pure logic: Game mathematics without interface coupling.
  2. Centralized rasterization: A single source of truth for rendering on any surface.
  3. Multiple views: The same state can be drawn as a favicon, on the page, or in ASCII.

It’s an excellent example of how clean design and best practices in programming can make even an absurd concept (a game inside a favicon) not only possible, but elegant.

More information at the link 👇

Also published on LinkedIn.
Juan Pedro Bretti Mandarano
Author
Juan Pedro Bretti Mandarano