I installed the software ���kbreakout 18.04.3-1.1��� also on my system.
Now I notice that the game area is displayed only in black while my terminal
window (where I started this program for another test try) is filled with the
message ���QQuickWidget cannot be used as a native child widget. Consider setting
Qt::AA_DontCreateNativeWidgetSiblings��� in a XFCE session.

Will any updates appear for a bug report like ���Kbreakout 15.11.90 just shows
black area where game should be���?
https://bugs.kde.org/show_bug.cgi?id=356736