Amid the COVID-19-induced stay-at-home requests, an age-old pastime is experiencing a renaissance: tabletop games.

Take Nanja Monja, a Russia-born card game featuring colorful illustrations of strange but adorable monsters that was introduced to Japan in 2016 by Sugorokuya, one of the nation’s largest game publishers.

While the game, also known as Toddles-Bobbles in English, has grown popular thanks to influential YouTubers praising its addictive simplicity, sales skyrocketed in April when the government issued a state of emergency over the rising number of coronavirus cases.