I approached the writing from the perspective that I thought I'd be able to do this the usual way I write, which is what I did. For each sentence, I first checked for the number of words needed and then wrote my sentence, trying to roughly estimate as I wrote, but not so much I'd restrict myself on giving the sentence meaning.

My plan then was go back to edit and either add or remove words to get the number right.

I estimated pretty well on most sentences and the changes needed didn't have a detrimental effect on the meaning of the sentence. But I actually estimated five of the bigger sentences perfectly, which I thought was pretty amazing.

I found out about your contest from my friend @owasco, who had entered for round 4. The contest looked like fun and a challenge, so when I saw the post for round 5 I went at it. I entered and will continue entering because I enjoy the uniqueness of the challenge.

I think I find this contest idea interesting for the same reason you started the contest; the 31 sentence structure producing a supposed unique rhythmic quality to the story. There wasn't anything I didn't like about it. I think it's a great and very original contest idea. Thanks for running it!