The Core

Your purpose is to reach the center of the earth, around 2500 kilometers deep. To accomplish this, you have to stay alive by maintaining the onboard machines and keeping the drillship aligned on course to ensure you make it as fast as possible.

There are 4 main resources in the game, each associated with a machine that produces or maintains them. Each of these machines have their own durability as well, which stop generating said resources when they break. You can also turn off a machine from the power grid to prevent its durability from wearing out at the cost of the resource and power. If a machine breaks, you can fix it by performing a machine specific mini game, which fully repairs its durability. 

Controls

Click to move around the ship or on any of the machines to interact with them. The machines will start a mini game if they are broken. The steering and Power panel can be interacted with whenever you want.

Onboard Systems

Pressure - Created by Hull Compressors, keeps your ship from imploding from the massive pressure.  It decreases slowly and rises fast, but the hull compressor deteriorates quickly, so use it sparingly. 

Minigame: Pump, pump the pump to pump the pressure!

Oxygen - Synthesized by CO2 scrubber, it falls fast and rises fast, meaning that it is usually top priority when its machine breaks. 

Minigame: Patch up, click on the cracks to patch them up.

Temperature - Cooled by Coolant, even though it might make you think higher values are bad, you are actually meant to keep it high.  Its durability consumption and drain rate are balanced.

Minigame: Pipe connecting, rotate the pipes to connect the pipes on the left and right sides.

Electricity - Generated by the Power Grid, its depletion does not lead to a game over, and it feeds all the other systems.

Minigame: Crank, spin the crank at a constant and steady rate to fill up the bar and stabilize the electricity.

Steering - Don't forget to steer the drill by centering the steering indicator, it will always slowly drift away, so keep an eye on it. The steering menu also has the thruster, which lets you speed up in exchange for increased drain by keeping the thruster in the green area.