FlxInvaders sounds and music (#335)

Arcade/FlxInvaders/source/Alien.hx

@@ -47,6 +47,12 @@ class Alien extends FlxSprite
 		velocity.x = 10;
 	}
 
+	override function kill() {
+		var snd:String = FlxG.random.getObject(["assets/alien_die0.wav", "assets/alien_die1.wav"]);
+		FlxG.sound.play(snd, 0.9);
+		super.kill();
+	}
+
 	/**
 	 * Basic game loop is BACK y'all
 	 */

Arcade/FlxInvaders/source/PlayState.hx

@@ -1,5 +1,6 @@
 package;
 
+import flixel.sound.FlxSound;
 import flixel.FlxG;
 import flixel.FlxObject;
 import flixel.FlxSprite;
@@ -60,9 +61,17 @@ class PlayState extends FlxState
 	 * Inside this function we will create and orient all the important game objects.
 	 */
 	override public function create():Void
-	{
+	{	
+		if (FlxG.sound.music == null)
+			FlxG.sound.playMusic("assets/theme.ogg");
+
 		FlxG.mouse.visible = false;
 
+		if (statusMessage == "YOU LOST")
+		{
+			FlxG.sound.play("assets/lose.wav", 0.9);
+		}
+
 		// First we will instantiate the bullets you fire at your enemies.
 		var numPlayerBullets:Int = 8;
 		// Initializing the array is very important and easy to forget!
@@ -187,6 +196,8 @@ class PlayState extends FlxState
 			// Player died, so set our label to YOU LOST
 			statusMessage = "YOU LOST";
 			FlxG.resetState();
+
+
 		}
 		else if (_aliens.getFirstExisting() == null)
 		{
@@ -201,6 +212,8 @@ class PlayState extends FlxState
 	 */
 	function stuffHitStuff(Object1:FlxObject, Object2:FlxObject):Void
 	{
+		var wallSound:FlxSound = FlxG.sound.play("assets/wall_break.wav");
+		wallSound.pitch = FlxG.random.float(0.9, 1.1);
 		Object1.kill();
 		Object2.kill();
 	}

Arcade/FlxInvaders/source/PlayerShip.hx

@@ -1,5 +1,6 @@
 package;
 
+import flixel.sound.FlxSound;
 import flixel.FlxG;
 import flixel.FlxSprite;
 
@@ -62,6 +63,9 @@ class PlayerShip extends FlxSprite
 		// space bar was just pressed (no autofire in space invaders you guys)
 		if (FlxG.keys.justPressed.SPACE)
 		{
+			// Play a sound effect when the player shoots with slight random pitch
+			var shootSound:FlxSound = FlxG.sound.play("assets/player_shoot.wav", 0.5);
+			shootSound.pitch = FlxG.random.float(0.9, 1.1);
 			// Space bar was pressed! FIRE A BULLET
 			var playState:PlayState = cast FlxG.state;
 			var bullet:FlxSprite = playState.playerBullets.recycle();