The puzzles range in difficulty from
"There is no reasonable way I could have gotten all of those answers."
"OH! I know what this is!".
The idea is to figure out what it is you're trying to solve. If you do that, you have "won" the puzzle.
Filling out the answers is a bonus.
You can find the others in the series under "Take another quiz from MightyThor" > Words > Clueless Puzzle Series.
I didn't know there was a 500-word limit until I tried to add a word to one quiz in design mode and the site complained about too many words. Originally, because there would be too much typing, I used the import function to add all of the answers. This does not enforce the limit. Maybe when the quiz is moderated it gets enforced.
Oh well, I guess I will have to keep the entries in the series to shorter versions. Maybe I can do this by using hidden answer components. I don't think any one of the entries has 500 unique words.
Super hard though, the differences between words like man, man's, tomorrow,tomorrow's, etc makes it difficult to get all of them. 805 isn't too bad though!