Using the keyboard to control the girl, manoeuvring her out of danger, you use the mouse (a piece of chalk) to draw a line. This line of chalk has many different properties, such as the ability to destroy enemies. Usually, a game like this will have you blasting away at the enemy until they are no more. Fortunately, a game like this is also unique. Each enemy has a minimum of two points on its body which destroy the enemy if a continuous, unbroken line is drawn between the points. Other enemies will need to be destroyed by drawing a line between their bullets and their own ships.

The chalk line is limited in how long it can be, but there is no limit to how many times, or how frequently you can use it. At times acting as your primary weapon, the chalk line can also be drawn as a shield between you and enemy fire. The nuances and details in the game are many and will require frequent re-visits in order to conquer fully. A wholly enjoyable game which you should be enjoyed by anyone with a taste for originality.