LordStrongold, I agree with your comment, but you need to understand that my objective was to develop a very simple game to finish it as soon as possible. And the point of the game is focused to give a lesson and not so much in gameplay.
I tried pausing the game, but it wouldn't work. Also, it's a good idea, but like Stronghold said, it does get a bit boring. Maybe if after you lose health, the sky could turn orange or something.
