Momo the cat defeats ghosts in Google Doodle’s Halloween game

Got some time to kill? Google Doodle's Halloween game introduces cute little Momo the cat, on a mission to save her school of magic from being attacked by ghosts.

The rule is simple: draw the shape seen above the ghosts' heads to cast them out of the school.

According to Google, the inspiration for this "cat spell-casting game" is a real-life black cat, also named Momo, who belongs to Google Doodle artist Juliana Chen.

The game has five levels, all in school settings: the library, the cafeteria, a classroom, the gym, and the school building’s rooftop.

"We had lots of fun ideas for the resident foe of each level, including a chef ghost, a Venn diagram ghost, and a big whistle ghost that summons other spirits," said Google.

WARNING: Make sure you're not at work when you play this game; it's weirdly addicting! — Jannielyn Ann Bigtas/BM, GMA News