Portal. It generates Narrativium, substance needed to restart the current world or travel between the worlds. In the next update its functions will be unlocked.
Portal power element. Increases the portal's Narrativium production. Make sure to connect engine or a hammer to it, or spin with your swipes. First they gather energy from rotation, and then discharge to the portal.
Mine. Works in quite an unusual way. It generates ore wagons, which, when transported to the Money producing machine, gives boost to its productivity. The longer the mine is operating, the higher boost the machine receives.