Hi Sasuchi,
Thanks for playing our game, :) you are supposed to go left from the first station, so the stations will be on the left side. On the right side of the tracks is what's called the third rail. It is used to power the trains as they are in the tunnels so they won't require fuel/charge halfway through. It has a high voltage so you shouldn't touch it. As for the trains you aren't supposed to chase them you are supposed to keep going down the tunnels and keep progressing, hiding from the trains as they pass. If you need more help with the deaths a guide is in the description.
Thanks for the feedback though we will make sure the full version is more clear and it will probably be more fun because it will be more polished.