Mouse Interaction.
Dream up a situation that you are working in bomb squad department in your city. One day, you got a call to your office that a no mans train approaching your city with time bomb from the nearby City. As an official you took all preventive measures in clearing the train tracks. The only negative thing was that the train could not be stopped. The objective of keeping bomb in the train was to hit the atomic power station in your city. The only way to stop the disaster is to diffuse the bomb. After so many difficulties, you got into the train and was about to prevent the city from disaster. As you are the person of good problem solving nature, surely you will find the necessary objects to solve the puzzles.
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