Use up and down to change the numerator of the slope of the cannon . You can also use the slider. Type n to type a value. Use left and right to change the denominator. You can also use the slider. Type d to enter a value. Press space or click the cannon to shoot. Match the colors of the balls. When you hit the same color ball, it should disappear and you should get 1 point. However, the game mechanics could use a little work. Pressing r will give you a guide line. Pressing t will give you horizontal and vertical guidelines. Pressing h will hide the guidelines.
