Games without downloadable files or other consumable content aren’t indexed, AFAIK.
I completely missed that there was nothing to download.
To OP: yes, you are doing something wrong. You are publishing a game page with no content. What kind of reaction are you expecting from hypothetical viewers of this page? There's nothing there to play. There's not even enough of a description to get excited about. You have one chance to make a good first impression, and you're blowing it. Itch is doing you favor by not indexing your page.
Sorry I am very new to itch so I don't know the rules here yet. My intention was to advertise the game like a lot of game studio was doing pre-releasing; post dev log or gameplay clips on youtube before the game is actually out. At first I didn't publish anything I just posted some devlogs on the community but I didn't get any views so I thought I should made a publish. Do you suggest I take the page down then? I really didn't know where else do you suggest to promote a game though, I have tried Twitter, Reddit, Instagram already.