Most of the first part of the soundtrack, written by shunter and Lmallet, you can skip. It's mostly not very good, the "programmer music" of Simutrans. Unfortunately, it's also most of the soundtrack, so it's probably most of what you hear in-game. The OST opens with two real duds, two of my least favorite songs in the whole thing: Simutrans Main Theme and Gotta Catch That Train. Really, that's what they picked for the main theme? Couldn't have gone for anything else? I suppose this is a good time to mention that the names of songs on this OST have some ambiguities. There's two canonical sources for their names, and they differ in capitalization and even spelling in a few places. So it might be "Gotta Catch That Train" or "Gotta catch that train", who knows.