You should not promote on itch.io in my opinion, it is good as a place to drop your files and let other people download it but other than that, you should be promoting outside of this place.
By the way, if I may say so myself, your game looks quite a bit boring which may be why people don't want to give it a second glance. Maybe you should put anime girls in it or something to draw people in, I mean if you look at all those awful mobile gacha "games" they're not very good at all, but they are popular because of the anime girls. My observations. Carry on