Great take on the theme, clever to do it with a spreadsheet, but I couldn't actually try it out.
I couldn't make a copy when following the link from the project page on itch (the google sheets menus are not visible and I don't know how to make a copy without using the File menu in google sheets), and I couldn't obviously edit the sheet from your link, and the link in the Enigma.txt download just gives me a "Page not found" when copied and pasted into Chrome.