Interesting concept, held back by superficial restrictions. It would be better not to suggest a topic to write about, and just let the player write about whatever without making him feel guilty by not doing what the dev wants from them. The water also kills to fast, and there shouldn't be a restrictions on when and where you can write something.
Viewing post in The Things We Lost In The Flood comments
I'm pretty sure you can write wherever and whenever you want, if you mind the cooldown. And the suggested topic is just there if you don't know what to write about, I don't know what exactly you mean with 'making the player feel guilty by not doing what the dev wants from them'? You can just ignore it if you have something better in mind.