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
1) Construct can't differentiate from left and right shift (as well as from left and right ctrl) because of limitation of JavaScript. (Browsers also doesn't)
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?