Most of the game screen rolls from right to left following the movement of the train. The controlled character can fire up/down or forward/reverse. Blowing up box cars reveals hostages that add to your score. Some times it can be a bit frustrating because of the absolute directions you're shooting in - it's just hard to get the controller to accomodate your needs, and you wind up getting shot while you're setting up. All in all, though, it's an enjoyable arcade shooter.