It sounds to me, that you don't actually fully understand the impact the whole adult game situation have on this game. Sure you may never plan to earn anything from the game, but also as with all other NSFW/Adult tagged games on the platform, while the page for the game (obviously) still exists, as far as most of the rest of itch.io's systems are concerned it might as well not be, as it is completely de-indexed.
That is to say, even if you specifically type in "Magical Viking Erika" in the itch.io searchbar, you will not even then find the game, let alone trying to find it via tags or other kind of searching. Meaning the chance of anyone finding the game who doesn't already knows about it, is exactly 0% on itch itself, and even people who do know about it, have to either know/remember the exact URL, or actively be following you, to get notifications in their feed.
So to get anymore new players at this point you will have to use other platforms, and specifically link the game from there
Viewing post in No 1.5 Update Yet, but... comments
Welp, like an hour after I posted that the situation changed, a bit. While still true at the current setting, the game will be completely de-indexed, adult games that does not offer ANY payment (not even optional) for now, will be reindexed now https://itch.io/t/5149036/reindexing-adult-nsfw-content
I have a good understanding of the deindexing situation, but I’ve also never really cared about Itch driving traffic, at least for this particular title. It’s simply a convenient place for me to set up a storefront-like page where I can post blogs and update files without making a mess of things. I still post links to whatever major updates I make to other sites, particularly Weight Gaming.
I’ll admit that about half my traffic here comes from tag browsing, but overall the biggest single driver is still the Weight Gaming thread, and the rest is either external search engines. clicks back to the main page from people who landed on a blog post or my profile, or Itch collections, none of which are affected by the deindexing, though I’ll admit it does make it a bit harder for people to find it and add to their collection in the first place.
If this were something I cared about monetizing I’d be a little more sensitive about how traffic was being generated, but even then I’d still likely post on Weight Gaming, or start making use of the idle social media accounts I’ve got set up.