umm, Kornel. BIG problem. Armor. HOW DO U CHANGE ARMOR??? it doesnt say anywhere, and if u just pick it up, it says that u are already wearing armor! oh by the way add armor damaging, but make it simple, like 2 points per armor, and depending on armor, lower chance to be damaged, cuz i found like 10 flak jackets on the first level.
EDIT: oops, almost forgot! ADD A FIST ATTACK! but make it weakass, but enough to keep off that dammed lone juvenile after u ran outa ammo, so u can survive just long enough to get to a diff gun or some ammo. simply make it last-ditch, ie it can only be used if u have no ammo at all for any of ur three weapons, nor any grenades!