Awesome achievement for a jam game ! Having a level editor is incredible.
As others have said, the turns take pretty long. An idea to counteract this is could've been to automate turns until something relevant happens. For example, when you press the next turn button, the trains could go until there's a train station with a red light.
In the level editor, it would've been better to have the ability to rotate shapes rather than have one variation for each angle. Still, the level editor is pretty smooth which is NOT EASY to achieve. Congrats.
I didn't play much beyond the tutorial and trying out the level editor, because this kind of game is not easy for me. Nevertheless, I can definitely see the potential with this puzzle system