Added a laser that shoots out of the player's spaceship.  Laser has a 1 second cool down period.
Added sound effects for floating around as well as the background music.  Connected the sound effect of shooting the laser to the actual action.
Merged the HUDLayer onto the SpriteLayer and propagated the changes to all other corresponding classes.
A heart is now capable of being generated!  Test code is in place so that it shoots a heart upward when the laser enters cool down.