Interesting one.
Starting it (icon or console) gives me a black monitor with an "Input signal out of range" message from which it is impossible to get out.
I tried executing some commands "in the dark" but nothing worked except a power button press.
The second try, same thing happened, but I opened another terminal session (or whatever they're called -- Ctrl + Alt + F1) and from there killed 8Kingdoms, which still didn't work. Then killed xinitrc and that allowed me to login in X again.
Crazy, no?