Hi @9pfs1 I just moved this question out into a new topic to respond.
The .tutorial folder contains the markdown files, images, etc. that are used to build the tutorial pane on Replit. You can create your own tutorials in any Repl if you wish! Just create a new folder called .tutorial and add markdown files inside e.g. 1.md, 2.md etc. Hit refresh and the pane should appear.
Hope this helps!