GitHubLearning & Craft · Interactive guides
Cozy pixel-art game teaching the whole Rust Book across 25 islands and 187 levels, compiled with your own rustc and tutored by Ferris via Claude Code.
Why it’s a gem
The compiler grades you, not the AI, and Ferris can only talk, never cheat.
Live experiment lab demonstrating container query behaviour with resizable demos and annotated edge cases.
Six free interactive experiments on the assumptions that break software: predict the outcome, break it, repair it, and keep the regression test.
Free book-length guide to building right-to-left interfaces: logical properties, mirroring, icons, typography and layout flipping.
Beginner Python course where every program draws shapes on a canvas, so you instantly see whether the computer did what you meant.
Plain-English explainer of everything a single web page can learn about you, with expandable entropy math and no third-party tracking.
Interactive Scala 3 lessons in the browser with a live Scastie editor on every page and no install or account.