Saving update!

-Added First level end
-Added Second level for saves progress
-Added Screen fade(In, Out)
-Added Saves when you are reach levels
-Added Damage screen color
-Added Electro water
-Added Red barrels chain reaction
-Added New concole command
-Added Nova shotgun

-Fixed When crates closing door
-Fixed Stamina glitch
-Fixed Zombie animations

-Changed Shotgun weapon to Nova shotgun
-Changed Zombies damage (20 hp per hit)
-Changed Door model
-Changed Ladder behaviour

-Removed Standart shotgun for time

-Note when you are reach second level then you are save it level for next updates(starting game from 1 or 2 level)