Invulnerability during countdown, started roguelike

Now you can't be shot during the countdown(acts like and of game). For
some reason, the countdown will not start when you change the map, only
when you create a totally new game or a new one just starts
normally(tried to fix but failed). Started roguelike(only 2D tho, just a
single floor level). It can be considered finished, but might need some
fixes.