Kartofel is a game of skill and logic. The objective is to connect the numbered dots in order, without crossing over yourself.
At the beginning of each level you start from the dot marked "1." From there, you have to get to the dot "2", "3", etc. First, you need to set your initial direction using the "Turn left" and "Turn right" keys (you will use the same keys to change the direction once you start moving.) The direction is shown by the little line segment sticking from the dot. You can also adjust your speed at any time. To start moving, press the "Go" key. Once you start moving you can't stop until you reach the next dot. You will notice that the dots you've visited change the color from yellow to white. The level is completed successfully when you visit the last dot. You can't cross over yourself, cross any of the lines that are part of the level or hit the wall. If you do, you lose a life. On some levels you will notice a special dot with a little stick figure in it. If you visit such dot, you get an extra life. Visiting those dots is not necessary to finish the level.
You can start a game from any of the levels you've reached in the previous games. To adjust the starting level, use the left and right arrow keys on the "New Game" menu item.