German video game designer and influencer Manuel Otto apparently died by suicide while he was livestreaming on Twitch, according to the streaming platform and his colleagues. He was 30.

Otto was a 14-year-old high school student when he created his most famous game, “Stick Run.” The free Facebook game, later an app for Android and Apple, was played by tens of millions of people.

His body was found Tuesday after authorities responded to reports of a blaze in an attic room on a property in the Bavarian village of Breitbrunn am Chiemsee, the German newspaper Bild reported .

Colleagues confirmed his death on social media.

“It is with a heavy heart that we confirm and announce the passing of our creator, developer, and fellow Stick Runner, Marc-Manuel Alexander Otto,” the Stick Run Team posted Wednesday on Facebook .…