Cookie Clicker.

Cookie Clicker is an incremental game created by French programmer Julien "Orteil" Thiennot in 2013.

How to play Cookie Clicker is very simple. The player will initially click on a large cookie on the screen, earning one cookie for each click. They can then use their earned cookies to buy properties like "pointers" and other "buildings" that automatically produce cookies.

This game has been released on many different platforms and has many different versions.
You can play it and learn more how to play in this game here.

Use the mouse to play.