Office Door Escape

Your co workers has already left the office but you didn't recognize that still working at office in your cabin then finally you realize that the office is very calm. So you head out from your cabin and see that no one is in office its already too late so find the key for the each doors and escape from here or you may sit at your cabin until to the next morning. You can find useful stuffs and interesting clue's symbol's to solve and finally escape from office door.