What does it mean when screen flashes blue?
I purchased Mirror's Edge on Steam, unfortunately EA did not include the instruction manual in the Steam version of this game.
Can anyone explain me what does the "blue flashing screen" effect mean? It happens sometimes when I start a level.
Alternately, is there a place where I can get the instruction manual?
The blue flash indicates that your "reaction time" - the slow-motion mode you can activate in melee combat - is recharged. This is mentioned on page 8 of the manual but not, if I recall correctly, anywhere in game.
As for the manual, there are scans available on ReplacementDocs, at least for the PS3 version; as far as I know, there's no official way to get the manual other than buying a hardcopy of the game. (Edit: @lunboks is better at searching than I am and provides a link to the official PC manual in the comments.)