While this game probably won't keep your interest long-term, if you just want to mess about with some trains it is a fun distraction.

Much like the Lemmings games of old, you have a number of creatures you constantly head in one direction and cannot be directly controlled. You guide them around with special units and by influencing the map. The difference here is that instead of preventing them from killing themselves, you must guide them to feast on the delicious brains of the human survivors. This is quite satisfying in itself, but many of the levels feel a bit too scripted, like there's one and only one way to solve it and you just have to try to figure it out. More possible solutions would allow for more creativity.

In a train game one of the most important things is to make laying out tracks and routes easy to go and intuitive, and this game just doesn't do that. Added to that, it's fairly buggy and the developers abandoned it to work on Transport Fever instead, so it's really not worth playing unless you are somehow starved for a train game and able to pick this up cheap,