I was also rather disappointed that when curling this "shell", nothing happens. Or rather, you just get the minified javascript just like it would give to your browser and using a shell to access this would-be-shell does absolutely nothing. And no tab complete, up arrow, and I see elsewhere in the thread that even ./ didn't use to work. It seems the author has very limited experience with shells and made an -- I would say 'elaborate' but it wasn't -- rick rolling page.
Come on, you cannot infer that the author has "very limited experience with shells" from an incomplete (early!) implementation. Read the rest of the thread anyway, you'll understand that you are mistaken very fast.
I agree that a fallback website when JS is disabled (with complete relevant content) would be good (progressive enhancement), with a hint that one may want to try enabling Javascript for fun.