Holon

HOLON is a factory building game where an entire production line can become a single building inside your next factory.
Extract shapes from the world and carry them along conveyors to the Hub. Each completed order brings new tools and more demanding shapes to produce. Making the right shape is only the beginning. Next comes making more of it.

Your processing machinery lives inside Nests, small factories you can enter and build yourself. Connect their inputs and outputs, then arrange machines to stack, rotate, cut, and paint shapes. Step outside and watch your Nest work as one part of a larger production line.
Once a design works, save it and use it again. Unlock larger Nests and place smaller ones inside them, combining familiar designs into increasingly capable factories. A compact building on the surface can contain layers of machinery working together underneath.

Expand across an endless map to reach new resources, or build deeper to fit more production into the space you already have. Connect productive areas with Energizer towers to boost your machinery, and extend that boost toward distant resource patches with relays.
There is no combat or deadline. Take your time experimenting, untangling bottlenecks, and finding a better layout. Every new order is a reason to rethink what your factory can do.