Your games seem to be good for that particular nieche, so you should be visible to fans of the genre by picking out appropriate tags. Since you do horror games, you might want to select the tags very carefully, as there are so many horror games with generic tags. Or else all you will get is a spike while you accidentally are visible somewhere - like with a major update devlog in a few months. And if you do short one shots, maybe there is a game jam where your games fit in. In my opinion you need to build an audience for these type of games, as I assume you do not have recurring players for the games. In other words, people play it for 5 minutes and move on. Might be completely wrong of course.
As for the tags, these here tell me not really much beyond: it's a horror game.
Survival, Action, 3D, Atmospheric, Creepy, First-Person, Horror, Psychological Horror, Retro, Short, Singleplayer
Survival, Action, 3D, Atmospheric, Creepy, Dark, First-Person, Godot, Horror, Indie, Short, Singleplayer
Survival, 3D, Atmospheric, Creepy, Dark, First-Person, Horror, Indie, Psychological Horror, Short
Those are three different games, are they not? I could not tell by the tags. You can ditch the Indie tag and the Singleplayer tag. They do not carry information on Itch. You can tag things like bigfoot or other things that are related to the games that would distinguish them from similar games.