You are The Engineer, stuck in an irreversible lift system, forced to climb through unstable, changing floors. Every step is a risk. Every mistake costs time and energy. The aim is to survive for as long as you can. The keys are WASD and you can use them to move. You have to locate the lift exit (you can find this looking at the signal locator) once you find it, it takes you to the next level. You can pick up and put down blocks next to you also using your mouse and clicking on them. There are red enemies along the way which you want to avoid so they don't drain your energy.