The railroad tracks are laid intuitively with your finger on the limited, relatively small pitch. Improper connections stretching can undo if required, individual fields can be deleted easily.
The aim is to bring more trains, which depart at your fingertips all the same, from A (box with cross) to B (field circuit). In the first level is made even this very simple. At the beginning and there are a few helpful explanations, eg how to use switch (switch at each crossing of a locomotive automatically) and especially now it will be interesting what in collisions of trains (color change) or when merging two locomotives of 2 tracks on 1 track (color change + reduction of 1 locomotive) happens. All of these effects are easier to understand than I can describe here. One must note this in route planning but in order to the destination stations the right number of engines, and especially in the right color, arrives.
The game is in my opinion programmed exemplary. Clearly structured menus, smooth animation, no unnecessary frills. Even at a special mode for players with color vision deficiency or color blindness was thought (the start and end fields are then additionally marked with letters).
The nice thing about the game is that you can actually progresses with much consideration and less naked try. Although the level of difficulty is constantly increasing, as well as the learning curve of the player. We initially believed not that creative tasks with so few basic rules are possible.
In my opinion, an absolute highlight in the app jungle, therefore Highest rated! (Tested on a Galaxy Tab S)