EndMenu, Health, Junky, Menu, Timer, Controlls

EndMenu: made esc exit button and removed unneeded and unused GUI
element
Health: doesn't make GUI element during EndMenu
Junky: added booleans for checking whether Junky is debuffed and looking
towards the right.
These are used to scale Junky's x-axis to flip him.
Added esc to exit during game.
Score only decreases during Scene01 and Scene02.
Saves score and loads it for Scene02 and EndMenu.
Menu: fixed typo
Timer: only decreases during Scene01 and Scene02, doesn't show GUI
element during EndMenu.
Controlls: fixed typos