This content originally appeared on DEV Community and was authored by ThatOneCaleb
I started this after noticing how unequal access to coding education was in my community. Some kids had every resource imaginable; others had never touched a computer. I wanted to build something free, browser-based, and unique that anyone could use to learn how to code without needing an account, a subscription, or a powerful computer.
Claude Code helped me build it. I handled the design direction and content. Claude wrote most of the implementation.
What is it
Forge Code is a coding challenge game that runs entirely in your browser. You write a solve(text) function, hit run, and it checks your answer against the expected output. JavaScript runs natively in a Web Worker. Python loads via Pyodide. Nothing is sent to a server. No login required.
Two tracks
The site is split into two completely separate paths.
The Academy is for beginners. There are 24 challenges, and every single one is preceded by a lesson. It is designed for people who have never written a line of code.
The Gauntlet is for people who want a real fight. It is a story campaign across five acts, starting at medium difficulty and escalating to genuinely brutal algorithmic puzzles. Every hard challenge generates a unique input per player using a seeded RNG, so your numbers are different from everyone else's. You cannot just copy someone's answer.
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How the puzzle system works**
This was the part I was most excited to build. For harder challenges, instead of everyone getting the same input, the system seeds a random number generator with your player ID and the challenge ID. That seed deterministically generates your puzzle input and the correct answer.
If you try it, I would genuinely love feedback such as which challenges felt too easy or too hard, and whether the Academy lessons actually taught you anything. Have fun coding!
This content originally appeared on DEV Community and was authored by ThatOneCaleb
ThatOneCaleb | Sciencx (2026-08-12T18:16:41+00:00) Built a free browser coding game with Claude to help my community. Retrieved from https://www.scien.cx/2026/08/12/built-a-free-browser-coding-game-with-claude-to-help-my-community/
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