Move the train car at the top of the screen left or right, and when you release it at the right spot, it will fall down.
The falling cars bounce and slide, so feel free to stack them high or scatter them around however you like.
You can use various types of trains such as bullet trains, local trains, steam locomotives, freight trains, trams, and maglev trains.
Tap the icon at the bottom of the screen to change the next type of train that will fall.
Tap the "eraser" icon to remove trains.
There are also special buttons that let trains fly out automatically, get launched, or grow huge.
Play however you like — stack them gently, scatter them wildly, line them up in a single row or two, alternate the layout, or stack by train type.