At the station, the players can use [[Bolts]] to upgrade their train or to buy a new engine. When buying a new engine, the next map segment progresses to the next [[Biomes|biome]] and the train speed resets to a lower value. | At the station, the players can use [[Bolts]] to upgrade their train or to buy a new engine. When buying a new engine, the next map segment progresses to the next [[Biomes|biome]] and the train speed resets to a lower value. |