https://kiomet.com/ seems fun :)

Edit: Please post it to one of the other gaming communities next time, this one is about factory or automation games :)

Never heard about it, what is it?

This isn’t a factory and automation game

nice and simple

I’ve heard about it multiple times while researching rust game engines…
it’s open source and they use their own in-house game engine which is kinda interesting… (usually for projects of this scale, you either use a game engine/framework or integrate opengl/vulkan/wgpu code directly into your game, as there’s no need for creating a flexible engine if you’re the only user)