If you're serious about this—I once dreamed of a first-person 3D game where you build tower defenses inside a massive industrial building to hold back waves of enemies (there are probably similar games out there, but none of the ones I've played were very good). Also, I'm currently playing a game about becoming an indie developer—it's basically about how you release your game on Itch.io, get very little traffic, can't register for Reddit, and can't participate in many game jams because you use AI art, so you end up just hanging around in various communities. The game itself isn't particularly fun, but I feel like I'll keep playing it for a while longer anyway.