I think, it would be nice to add to the FAQ, Manual or "Frequently asked questions topic" information about 2 important problems.
I've tried to define controls for 2 players on 1 keyboard (it's very necessary feature for fighting or football game, or even TDS with split-screen), and found out that
2) Most of keyboards have troubles with detecting arrow-keys and numpad keys, pressed at the same time.
(try to press up-arrow +left or rigt arrow+ num0, no effect).
Maybe there is another unobvious problems :) Does anyone know about it?