Players take on the role of a factory worker in a simulated assembly line, tasked with operating a machine that assembles small parts while avoiding increasingly hazardous bolts.
The game starts with a brief tutorial, guiding the player through the mechanics of the assembly process. They quickly learn to navigate the factory floor, moving back and forth between different stations to gather and place the correct components in a specific order. The player's progress is tracked by a timer, with penalties for inefficiency and mistakes.
The ultimate goal is to complete as many assemblies as possible within a set time limit, all while preventing the hazardous bolts from disrupting production. The game plays out entirely in a browser without download or registration requirements, relying on timer-based pressure to create tension.