Cookie Clicker is a 2013 incremental game created by French programmer Julien Thiennot. The user initially clicks on a big cookie on the screen, earning one cookie per click. They can then spend cookies on buildings, which will automatically produce cookies. Upgrades can improve the efficiency of clicks and buildings, and other mechanics lead to many other ways in which the user can earn cookies. Though the game has no ending, it has hundreds of achievements, and users may aim to reach milestone numbers of cookies.