Codes:

 LDKD  HTDC  CLLD  FXLC  KRFK  KLFB  XDDJ
 LBKG  KLFB  TCCT  DDRX  TBHK  BRTD  CKJL
 HRTB  HBHK  JCGB  HHFL  TFBB  TXHF  JHJL

 Hints:

 1. In scene-2 you can go up in the elevator and right to the window to
    see a small clip of the city.

 2. In scene-14 you can have some fun by pressing some of the buttons
    (the tank will start shooting lasers and rockets towards the aliens).