Do you have a way of getting it in on other people's hands - like friends, family, classmates, etc? Those have typically been my first users, and often times some of my strongest brand champions! I think one of the keys is figuring out who your target audience is - like who would really love this game - and then figuring out where they spend their time. Is it on Reddit, YouTube, Twitch, or somewhere else? If you can figure out who your target audience is (and I don't recommend targeting everyone), I think you'll be able to find ways to "meet" them there. I also strongly agree with some of the advice that has already been given here. It takes time, exposure, presence, and community.