You manage a train company with various stations and lines. You have to build a network able to deal with all the trains of the company, allowing them to go from the start to the destination position. Have in mind that everything you do has a cost (build railways, demolish obstacles, etc.) and if your balance is negative you lose the game. You earn money when a train reaches a station. The game starts in the year 1800 and finishes in 2020; you start with old-fashioned trains and industries, and as you advance in time the technology improves. You have to combine many railways and stations to make the trains reach their destiny, avoiding collisions and wrong ways: the trains will come back when they cannot continue advancing. If there's obstacles on the way where you build the railway, you can destroy them with bulldozers, but it's very expensive. If a trains collision happens you'll also have to pay compensations that are extremely expensive.
Click at the type of item you want to apply (piece of track, bulldozer), then click at the position where you want to apply it. You also have other options, that you have to explore as you progress in the game.