Drawing rail -> roller coaster!

[Explanation]
*After START, please move the railway line as you like to the blue sky.

*The upward direction of the railway will be in the sky and the downward direction will be near the ground. The depth advances automatically.

*When you finish drawing please press the right bottom → icon. The track is completed.

*After that, since it becomes a figure seen from the top, you can arrange buildings, houses, trees, towers as you like, around the railroad tracks.

*Please press the → icon at the bottom right after placing. The roller coaster is on!

* During the roller coaster you can change the speed with the orange icon on the left, you can change the viewpoint with the yellow icon on the bottom right.