I LOVE THIS GAME! It’s relaxing, tense, time-killing, and it never gets boring! I just have a few suggestions;
1: Passenger mode; Why can’t you play as a passenger? It would be SUCH A GOOD FEATURE!
2: New Maps; Maybe more cities and countries!
3: More Railroads; This is an in-game purchase, and it would unlock new maps(like LI), trains, and more shape stations!
4: Terminals; Terminals are like interchanges, but they are larger, faster boarding and departing, and five or six lines could enter all on one side!
5: Weekly and Monthly Levels; Weekly would always be extreme, and monthly would also always be a new mode called Demon, where lines are permanent and overcrowding is 1.5x faster than normal! And Daily levels would just be normal mode.
That’s all my ideas for this game, and if you could take these ideas into consideration, i would highly appreciate it! If you are reading this, I am a big fan of your work. Thanks!