So... since we have a keyboard and only use WASD along with three other keys, I would like to roll on a key as well, instead of double tabbing, it's unresponsive and tedious. Especially since we have to rely so much on the roll for the sudden death stages.
Also, why can I continue with spacebar on some menu screens, while not on others?
As a fellow programmer I really must that I cannot understand your thought process here.