Maybe you’re dressing up for Halloween. Maybe you’re staying in to watch the latest season of the eerie British TV show Black Mirror. Or maybe you don’t celebrate it at all. Whatever the case may be, there’s one thing you should check out, and that is Google’s Halloween Doodle for this year. Featuring Momo the cat, this simple game is a thrilling way to kill time if you’re ever bored.

As Google explains, the goal of the Halloween Doodle is fairly straightforward:

This year’s Halloween Doodle follows freshman feline Momo on her mission to rescue her school of magic. Help her cast out mischievous spirits by swiping in the shape of the symbols above the ghosts’ heads. And you’d better pounce fast—the ghost that stole the master spellbook is getting away!

Essentially all you have to do is use your mouse or trackpad to draw simple shapes like lines, triangles, hearts, etc. Some ghosts have multiple symbols, and you have to draw each symbol in the order that you see. At the end of each level you’ll encounter a boss ghost, who has multiple shapes that regenerate. Make sure to draw as fast as you can because if you let the ghosts touch you, your HP will go down.

You can head on over to Google’s official website to play, or if you’re using Google Chrome, you should be able to see it on a new tab.