When you get into the game you will see that your bullets do damage to the enemies. As you hit them and take their health, they turn red. The darker shade of red they are, the closer they are to dieing.

The other cool aspect of the game was the boss battle. This was my first attempt at doing states for an enemy. Basically when you start out he has a very lax tracking algorithm. As you hit him he gets a darker shade of red and his tracking becomes faster and he becomes more aggressive.
-Recap
So for my first game I am really proud of what I made. The sounds and input were a real pain but getting all the aspects together made me really proud of what I accomplished. I also see that I've come along way as a programmer. If you are interested in playing it you can download it here. The exe is inside the folder.