First, you choose which one of the eight pages you want to color. On the bottom of the game screen you are able to find the colors that have been made available to you, and you will simply click on the color you want, and to color you click and hold them move the mouse around however you want to. From under the page you can also choose the eraser if you need it, and you also choose how big the point with which you color is going to be. Now that you know all this, start the game immediately, and don't look back, even for a second!