Lab hub
Interactive labs you can play offline-ish
Two teaching widgets live here as static assets on Cloudflare Pages: a dinosaur mini-game with a speed slider (recovered acceleration rule), and a Calculator % dual-rule trial. Operator-facing prose for rea.run — playable labs you can open without installing REA first.
01 · Browser
Dinosaur speed rule
Play with a slider. Auto-accelerate uses start 6, +0.001 while < 13. BSD attribution for the inspected rule.
02 · Native contrast
Calculator % dual rule
Try 200 + 10% vs 200 × 10%. Teaching disclosures point at Microsoft’s public Calculator sources.
What this hub is for
| Goal | Use |
|---|---|
| Feel the recovered rule | Open a lab page, press Play / %, no install required |
| Reproduce with REA | Follow verifiable steps on each lab page (browser debug or Calculator contrast) |
| Ship your own teaching file | Codex walkthrough: /docs/install-demo/ |
| Larger game Evidence | /showcase/dx-ball/ (sound-pan 0x406400) |
Compliance snapshot
- Public HTTP dinosaur edition / open Calculator sources — authorized teaching targets only.
- Dino drawing, jump, and collision on these pages are new teaching code; only the acceleration constants are reconstructed.
- Percent widget illustrates operator-dependent semantics; it is not a Windows Calculator clone.
- Footer disclaimer stays low-key. No crack / keygen / DRM content.
Related on rea.run
| Topic | URL |
|---|---|
| Dino install + Codex demo | /docs/install-demo/ |
| Calculator % showcase summary | /showcase/windows-calculator-percent/ |
| DX-Ball Evidence | /showcase/dx-ball/ |
| Chinese twin | /zh/lab/ |