Answer
When you start the game, click on the "instructions" link. If there is no "instructions" link, then click the "start" link and the instructions will be displayed before you start the game. Most games have a question mark icon at the top of the game that will display the instructions. You can press this button at any point during the game; when you are done reading, click the "start" button and you will return to where you left off in the game.
Also, there are directions on the page under each Game.