*No personal data collection.
*No micro-payments.
*Simple graphics: Minimize addiction by not using flashy animations.
*Intellectual: Game are more about logical thought than reaction times.

*Use onscreen joystick to drive the locomotive.
*Assemble the train ordering cars.
*Touch toggles to turnout.
*Touch triangles to activate decouplers.
*For an additional challenge, leave all three blank cars in the third siding.