@jimbly Wow, looks like you are really good at the game! (:
I need to ask: Have you played with mouse/touch or with the keyboard? I would like to know which input method leads to such a good score.
You are correct, there could be more options on routing the trains. I mean there are some options, e.g. you can route the trains from the upper-most track down and then up again, but not really different strategies. I thought about adding signals, but did not have time for that.
The game always spawns trains that can reach their correct destination without crashing with any other trains, assuming that you always route the trains perfectly with the shortest available route. I feel making a fatal mistake at some point is actually inevitable :P I guess, if there would be the possibility to loose just because there wasn't any guaranteed solution, then the game would feel a bit pointless.