Then. A Dark Room went viral. I suspect the author's lack of subsequent success with his other games stems from his apparent lack of curiosity about exactly how his first and only lucky break took place.
It's not about lack of understanding. The viral success of a "one-off" type of game like ADR is nearly impossible to reproduce. Sometimes people take a liking to something because you hit exactly the right notes without even knowing what notes they are (not that they do themselves even!), and it is impossible to hit them again. ADR looks like that kind of success. Repeating the success of GTA Vice City is very hard,…
The problem is that the OP here didn't write it. They ported it to mobile.
So they haven't yet actually created a game like this, they've just made some changes to an existing one that was already insanely popular and reaped the rewards for it.
Story-based incrementals are still incredibly popular in the incremental games community, and another good one will do quite well. It's very, very hard to charge for them, though, because nobody trusts them to be any good until after they've played it to the end.
So you basically have to make a free one and hope it takes off, and then charge for the mobile port of it.