global.right_key = 0;
global.left_key = 0;
global.up_key = 0;
global.down_key = 0;
global.shoot_key = 0;
global.swap_key_pressed = 0;
global.heal_key_pressed = 0;
global.start_key_pressed = 0;
global.space_key_pressed = 0;
global.back_key_pressed = 0;
global.pause_key_pressed = 0;
global.shift_key_pressed = 0;
global.one_key_pressed = 0;
global.two_key_pressed = 0;