Blueprint construction mode
While in the Main Menu, if you select a Blueprint Booklet, you will enter the Blueprint Construction Mode. This mode plays like a jigsaw puzzle. You can only place the pieces where they belong to build the Train Set that you see on the front cover of the booklet. When the pieces are placed, they are locked into place and can't be removed. However, you can start it over by holding the Bomb Button in the Main Menu.
How do I get more content?
You can access the Store via the Main Menu by tapping on one of the many boxes featuring Engines and Train Sets.
How do I reset my train sets?
In the Main Menu, by holding the Bomb button long enough, you can reset the Train Set or Blueprint Booklet that you have selected.