Every indexed square on the board symbolizes a potential customer to whom the "Shipper" is to make the delivery.
The index includes a number which denotes the bonus points for serving that customer, and the letters which help determine the order of delivery : the first letter of the next customer must coincide with the last letter of the previous one.
Each round the "Shipper" has a certain number of customers (orders) to serve. This number increases as the "Shipper" gets higher rank.
Penalties are incurred when the player goes back (-1) or starts the round over again (-2)
The game ends if the player reaches the target - which is 300 for easy mode and 500 for hard mode