Did not try the game, yet. But I did read your blog post https://ci-en.dlsite.com/creator/5053/article/979398
It's interesting to read your perspective. You can link to your dlsite from itch if you want. People like to look at the creator's profile, that would be a good place for links and to tell people that you've freshly translated old games and published them on itch.
"Pay what you want" is popular on itch. From buyer to publisher. And also from publisher to itch.
Unfortunately, many publishers only give 0% to itch. Just like a lot of players only give 0 to publishers.
"Pay what you want" is often supposed to be better than the fixed price, but it's not always better. You have a trial version and that makes a big difference.
If my machine translation told me correctly, you only tested for 2 hours. But that's not how people would pay for a free game. They would initially download it without paying and after playing it and liking the game, they would pay. But as a new and therefore untrustworthy developer on this platform, people might also be skeptical. There are a lot of bad accounts here that post games that could be found on dlsite until they are removed. It is unusual to see such games posted here by the developers. Usually, I see games that are posted by a company that specializes in publishing games overseas on behalf of the developer.
There's also the issue of censorship. It is not attractive to pay for games with censored computer-generated images on a US-based hosting platform. There are enough uncensored games here to choose from.
The post here has been machine translated back and forth in the hope that it will be easier to machine translate afterwards.