A 2D side-view factory builder where every grain of coal, every drop of water, and every wisp of steam in the world is its own simulated pixel. Dig downward, trigger landslides, melt ice into water, watch stalactites form on the ceiling, and make chemicals like sulfuric acid.

It is both a pixel simulation and a real factory game. Mine ore. Sift dirt. Smelt iron. Quench molten iron into steel at exactly the right moment. Lay conveyor belts and inserters, build chests with input and output sides, and grow a vertical factory deep into the earth. 

Unlock new technologies as you progress, but also pay attention to your environment and notice what you can create from raw materials alone. The mystery of crafting is there for you discover. If it's possible, you can do it from the beginning of the game.