Hello, I can confirm that bug still exists in latest package version 0.91. When you download and unpack GCompris from official website (http:// gcompris.net/download/qt/linux/gcompris-qt-0.91-Linux64.sh ) one of the folders contains qml-box2d library which is not installed by Gcompris-qt dependencies. Could it be the missing bit? -- Kind regards, Rokas