Freight Train Simulator isn't quite what you would expect. It is not a traditional simulator, as it has simplified controls, and plays more like an arcade game based on trains.
Each level of Freight Train Simulator gives you a stretch of track to cover, and a time limit in which to complete it. You have to accelerate and brake to get your Freight Train successfully along the track, and stop at the station at the end.
There are four keyboard controls: F and V for accelerate and decelerate, and G and B to increase or decrease the brake. You have to watch your speed round corners, so you don't derail, and make sure to stop in time at the end. There is nothing more to Freight Train Simulator. You can change your view with the mouse as your journey progresses.
The graphics in Freight Train Simulator are very basic. The environments are lifeless and uninspiring, while the trains are dull by modern standards. There is no detailed sim style interface, and you are offered only your speed. It is not a simulator visualization of a Freight Train's controls at all. If you derail, you will know you were going too fast, but you won't know how fast to go. Freight Train Simulator is a really basic game, and doesn't deserve to be called a simulator.
The only thing Freight Train Simulator has in common with a simulator is that it shares the boring presentation that feature in the worst simulators. Not recommended.