Click and match the cookies and other little Petri graphics to win the game. The game begins when you click the "Start" button.
Choosing a level will adjust the amount of time the pictures show so you can try to remember where they are located. Level 4 is normal, going higher makes the game more difficult. Level 9 is for those folks with an instant photographic memory.
If you stop the game and start it again, you will start from the very beginning. The game is not saved.
High scores are kept locally and do not show any scores but your immediate scores. This is merely for your own information. Challenge yourself by keeping track of your own high scores.