At each track crossing, there is a red/green switch. The train will follow the green path. When clicked, the switch will change the path direction. Pick up additional train cars and pick ups for points. You must watch out for obstacles on the tracks and avoid snaking the train into itself. Once all the cars have been picked up the tunnel opens to access the bonus mini game. If you finish a level quickly, you may be elegible for bonus points at the end of that level. Remember, the more you play the quicker you will become. Change your speed using the fast/slow throttle. Click on the speed and it will slow down or speed up your train. In the tunnel pick up sparkling jewels for points and lumps of coal for fuel.