Really glad to hear you've been enjoying it! Definitely agree that the difficulty is a bit low, I've been hearing a lot about that haha. I've been working on a small update that should ramp it up quite a bit in the late game + fix various other issues.
I hear you on advertising as well. To be honest, I was a bit busy and just didn't feel like making any marketing content haha. But this game is a passion project more than anything, and people seem to be having fun with it, so I'm pretty happy with how the launch has gone :)