The start of Power ups and shields!

I've been working hard on power ups. As of now, destroying a big ship gives you one health point and two shield points. You start off with two Shield points, and the maximum for shields is 12. This will probably turn into an upgrade system. I've already updated the downloadable build so you all can try it for yourselves. Also made the firing sound less annoying.

Also, from now on, I will not upload any more files until I finish the game, but I will upload images.