A security website that is a filesystem

There are 63 tutorials in 4 tiers. The web was better when it was a filesystem. I need your opinions. Thanks!

Great. I like it. Be cool if there was a way to view the entire file tree... ah `tree` command works!

A security site where the pages are files, and a real shell at the bottom walks the same tree the browser does.

Sixty three lessons in four tiers, each receipted on a lab you build. Every number a lesson prints carries the command that produced it, and the deploy refuses to publish when the two disagree. Flags are hidden in the filesystem rather than behind an account, and nothing on the site is gated.

Tell me where a lesson is wrong. That is the review I am actually after.