WOW very beautifull your game, loved the graphics style.
I am developing a game, alone, from 4 years (2 years to modify Unreal Engine 3 and 2 years on the game itself):
https://www.indiedb.com/games/fursan-al-aqsa-knights-of-al-aqsa-mosqueMy real life job is Web Design and Social Media Advertising, so I have a good experience on marketing (+10 years).
However, whenever working as a solo indie developer, you need to do everything by yourself. There is no "secret recipe" or magic to get noticed.
I will try to resume for you how I am doing it all alone, maybe you can get some ideas.
First detail, is that you need to do the marketing for your game in a daily basis, you need to consider it as a part of the development.
Second, you need to do like old days, mouth to mouth, people to people. You must not act like a bot (you will be banned), you need to get in touch with many people over the web.
You need to have pages on Social Media, like Facebook, Twitter (is very good), Youtube Channel, Instagram, and so on. Everything you can manage, is good.
You need aswell, register on as many game development forums, and general gaming forums as you can. The more the better. However, is always good before posting about your game, ask permission (contact the forum) for this, as many will not allow advertising.
You need to create compelling promotional art for your game, and share, manually share on all social networks. If you have facebook friends, this will help, if not, make friendship with random people who are somekind related to gaming, game development.
Twitter is excellent for this because there are thousands of gamers there, game developers, and so on.
Do not restrict to whom you are going to pitch about your game. Even other indie developers will help. You follow random people on twitter, then begin to interact with them, comenting about their tweets, and the like (begin a friendship).
Then after people already know you (after some interactions), you can tag them on a posting you do in twitter, like a new update, you go there and create a new banner, art, then share on twitter and tag as many users as you can. However, don't do it too fast, otherwhise twitter will ban you (make like 5 times by day, giving one hour of interval between each posting).
However, be aware man, that this is a VERY TEDIOUS WORK, but needs to be done all days. Each new friend, follower you get, ad him/her to a list of people you can tag.
You can search on twitter for IGN and Gamespot Journalist to tag them aswell. I am doing it however, these guys did not answer, like my tweet yet. But 2 Important editors of IGN Brazil (I am brazilian) already liked my posts and are now aware of my game.
In the end my friend, there is no "magic", there is a LOT of labour. But your game I think will be easier to marketing than my game, because of the political content, MANY sites banned me, even Youtube deleted 2 channels I had. However, I am stubborn, and NEVER GIVE UP.
My game even got into the list of TOP 100 Indie Games of 2019 on IndieDB Website!
Last but not least, there are a LOT of sites specialized in reviewing indie games, you can search on google and contact them. Dude, never underestimate anyone, even a small youtuber, small website who make a review for your game is good, valid, and can make a bigger site raise interest on your game.
The secret is spread your game to reach as much people as you can!
Cheers from Brazil.
PS: search on google
https://www.google.com/search?q=fursan+al+aqsa+game to see how I am making my game VIRAL on the web :D :D :D
Here is my thread:
https://forums.tigsource.com/index.php?topic=68991.0