I try not to comment on other people's games, Crush is doing a lot of great stuff with a lot of variables and is pushing Twine to its limit. Would the game be as successful if it wasn't for the custom character? I don't know. But I imagine it takes up a lot of time and is a technical nightmare to account for every single scene, then an expression change. I like the custom character stuff, but I could just do with a generic stylised portrait like the other characters. I really like the story and setting rather than the custom character stuff, which is just a nice bonus, but the writer's block must be real.
I've had it with the game I develop, I check in on other games sometimes and recognise the same problems I've had in other developers. It's really hard to put until you have developed your own game, one week everything will be perfect, then the next you're having a crisis of confidence with what you want to achieve and if you can achieve it. Sometimes you just get stuck on what the fuck to type next, then that turns into weeks and then months. Just my perspective, though I'm not getting a lot of money and have other commitments and I understand why some people get a pissy with it. I also get that people might think progress is slow because once the game is finished, then what? But other developers have moved onto other stuff and retained their audience. I have no idea if he works with other people or if it is a solo operation.
Just my two cents after I began working on my game.