Google's homepage features artwork of magical cat Momo swimming underwater and charging at a group of Ghosts alongside a play button.
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The game tasks players with using their mouse to swipe in the shape of symbols placed above the ghosts' head in order to defeat them.
The title, which acts as a sequel to Google's 2016 Halloween game also featuring Momo, runs for four stages that are filled with power-ups and boss battles.
"Feline lucky? Swim and swipe to PURR-tect the ocean and its creatures before it's too late," Google says.
