I'm pretty sure the idea is that the titles listed are all real titles. Your job is to find out which one is the correct one, and the humor lies in the fact that they are all pretty fitting. If people were to submit their own titles, it would be a funny game akin to Jack's Party Box, but it wouldn't be true to the original idea.
However, there is a link to github on the site, so I'd suppose you're more than welcome to make a fork of it to tool around with.