The wordplay is Jason -> JSON.
The linked help text for your `Usage Examples` isn't very helpful either.
How about an animated gif of you... adding multiple key-value pairs to be written to the file?
~ ❯❯❯ derulo hello
Entering Derulo interactive JSON builder.
prompt: key: foo
prompt: value: bar
prompt: key: %
~ ❯❯❯ cat hello.json
Maybe some control sequence would work? Not sure how you handle those in Node.