Well, he did it all wrong.

When you are done reading the Madlibs, it should read like a sentence. What he did was surround regular text fields with strange sentences. When you are done filling it out, you can't just read it like a regular sentence.

It should have been:

I would like to make bingo cards! Please save them for me under the name [ Your Name ], and and my email address is [ Email address] in case you need to contact me. But please [do / don't] contact me twice with hints, and [do / don't] send me a newsletter.

See, when you are done, you can read it like a sentence.

All he did was replace "Username" with longer wording. It didn't seem "fun" the way you did it, just odd and off-putting.