"Tomorrow marks the Final Quarter of November's lunar cycle, or 'Half Moon,'" the screen reads. "The Half Moon is the turning point in the lunar cycle, shifting the balance between light and dark like moves in a celestial game."

Join the lunar fun with Google's interactive Doodle! lay Google's interactive Doodle game, matching moon phases to celebrate November's Half Moon phase in 20+ countries.

To play the Google Doodle game, all you have to do is click on the graphic when you open up the search engine today (November 21). It will bring up the interactive card game and give you the chance to play against the moon.

Google's Rise of the Half Moon November Google Doodle celebrates the lunar cycle with an interactive and educational card game challenging players to match cards according to different phases of the moon.

The latest Google Doodle game is surprisingly fun, while also being educational about one of the coolest things in nature: The night sky.