First, this app is not meant for great gameplay. It is meant for the small kids who want to simply control the train. Your kid can see the steam mechanics run, run a train around a loop, and in the last layouts set the switches to control which way the train runs.
I am hoping they update the game with metal and fix the problems. The problems is are the train does not run on the track, the ground is above the track in places which caused derailments at times, backing up causes derailments.understand though this is designed for little kids to play, it is mostly fine. It takes a lot of effort to design games, espalier 3D games.