I think the dev posted about it in a gaming community within the last year. It had top town, 2D graphics. Each level you'd mine resources to build up you defenses to stop waves of enemies. I think you had to destroy the enemy's base to continue to the next level. As you went you'd unlock new tech and resources. I had fun playing it for awhile but eventually moved on to something else. Now I want to play it again and can't find it on my computer, so I guess I uninstalled it. I think it was available on itch and Steam.