Privacy

The short version: we don't collect your information. There are no accounts, no sign-ups, and no tracking cookies anywhere on this site.

What we collect

Nothing personal. You can use every lesson, Mission, and the Challenge Lab without telling us who you are.

What stays in your browser

Some features remember things so the site feels continuous — like which challenges you've seen and the trophies on your shelf. That information is stored by your own browser (a feature called localStorage) and never sent to us or anyone else. Clearing your browser data erases it.

Downloads

Missions are plain PDF files. Downloading one is just that — a download. No email address required, ever.

Links to other sites

Our videos live on YouTube, and some links lead there. Once you're on YouTube, YouTube's own privacy policy applies — we recommend a grown-up has a look at it.

Analytics

We may use Cloudflare Web Analytics, a privacy-first tool that counts page visits without cookies and without identifying who you are. We do not use Google Analytics or advertising trackers.

Questions

Ask us anything on the Contact page.

Last updated 16 August 2026.