The Cabin Factory is described as a horror game but it's sort of about deciding whether you are, in fact, playing a horror game.
There is indeed a factory and it does indeed produce cabins - jolly, Center Parcs-style affairs made of big, merry logs, which roll up fully constructed on a conveyor belt.
Your job is to enter and inspect them in first-person. What are you inspecting them for? Ghosts. If you see anything paranormal, scoot on back to the factory floor and hit the red button to condemn the structure.
If the building appears normal, press the green one (you won't, seemingly, have to worry about other habit certification requirements, such as checking that all the kitchens have fire blankets - different department, I guess).
In the event of a haunting, the predictable complication is that the spooks might not let you leave. Quite why your employer keeps accidentally building haunted houses remains to be seen.