diff --git a/resources/sprite_sheet.png b/resources/sprite_sheet.png
index d9264c6..e3d5bbc 100644
Binary files a/resources/sprite_sheet.png and b/resources/sprite_sheet.png differ
diff --git a/src/entity/EntityTypeC.java b/src/entity/EntityTypeC.java
new file mode 100644
index 0000000..2b16798
--- /dev/null
+++ b/src/entity/EntityTypeC.java
@@ -0,0 +1,13 @@
+package entity;
+
+import java.awt.Graphics;
+import java.awt.Rectangle;
+//used for Star Destroyer
+public interface EntityTypeC {
+
+	public void tick();
+	public void render(Graphics g);
+	public Rectangle getBounds();
+	public double getX();
+	public double getY();
+}
diff --git a/src/entity/EntityTypeD.java b/src/entity/EntityTypeD.java
new file mode 100644
index 0000000..9e0a38d
--- /dev/null
+++ b/src/entity/EntityTypeD.java
@@ -0,0 +1,13 @@
+package entity;
+
+import java.awt.Graphics;
+import java.awt.Rectangle;
+
+public interface EntityTypeD {
+
+	public void tick();
+	public void render(Graphics g);
+	public Rectangle getBounds();
+	public double getX();
+	public double getY();
+}
diff --git a/src/main/Controller.java b/src/main/Controller.java
index 1ed4f8f..fc253aa 100644
--- a/src/main/Controller.java
+++ b/src/main/Controller.java
@@ -6,13 +6,20 @@ import java.util.Random;
 
 import entity.EntityTypeA;
 import entity.EntityTypeB;
+import entity.EntityTypeC;
+import entity.EntityTypeD;
 
 public class Controller {
 	private LinkedList<EntityTypeA> ea = new LinkedList<EntityTypeA>();
 	private LinkedList<EntityTypeB> eb = new LinkedList<EntityTypeB>();
+	private LinkedList<EntityTypeC> ec = new LinkedList<EntityTypeC>();
+	private LinkedList<EntityTypeD> ed = new LinkedList<EntityTypeD>();
+
 
 	EntityTypeA tempea;
 	EntityTypeB tempeb;
+	EntityTypeC tempec;
+	EntityTypeD temped;
 	Random r = new Random();
 	private Skins skin;
 	private Game game;
@@ -27,6 +34,12 @@ public class Controller {
 
 		}
 	}
+	public void createStarDestroyer(int SDcount){
+		for(int i = 0; i < SDcount; i++){
+			addEntity(new StarDestroyer(810, r.nextInt(400), skin, this, game));
+
+		}
+	}
 	
 	public void tick(){
 		for(int n = 0; n < ea.size(); n++){
@@ -39,6 +52,16 @@ public class Controller {
 			
 			tempeb.tick();
 		}
+		for(int n = 0; n < ec.size(); n++){
+			tempec = ec.get(n);
+			
+			tempec.tick();
+		}
+		for(int n = 0; n < ed.size(); n++){
+			temped = ed.get(n);
+			
+			temped.tick();
+		}
 	}
 	public void render(Graphics g){
 		for(int n = 0; n < ea.size(); n++){
@@ -51,6 +74,16 @@ public class Controller {
 			
 			tempeb.render(g);
 		}
+		for(int n = 0; n < ec.size(); n++){
+			tempec = ec.get(n);
+			
+			tempec.render(g);
+		}
+		for(int n = 0; n < ed.size(); n++){
+			temped = ed.get(n);
+			
+			temped.render(g);
+		}
 	}
 	public void addEntity(EntityTypeA en){
 		ea.add(en);
@@ -70,6 +103,24 @@ public class Controller {
 	public LinkedList<EntityTypeB> getEntityB(){
 		return eb;
 	}
+	public void addEntity(EntityTypeC en){
+		ec.add(en);
+	}
+	public void removeEntity(EntityTypeC en){
+		ec.remove(en);
+	}
+	public LinkedList<EntityTypeC> getEntityC(){
+		return ec;
+	}
+	public void addEntity(EntityTypeD en){
+		ed.add(en);
+	}
+	public void removeEntity(EntityTypeD en){
+		ed.remove(en);
+	}
+	public LinkedList<EntityTypeD> getEntityD(){
+		return ed;
+	}
 
 }
 
diff --git a/src/main/EnemyFighter.java b/src/main/EnemyFighter.java
index 099c631..95d62d4 100644
--- a/src/main/EnemyFighter.java
+++ b/src/main/EnemyFighter.java
@@ -4,6 +4,7 @@ import java.awt.Graphics;
 import java.awt.Rectangle;
 import java.util.Random;
 
+import entity.EntityTypeA;
 import entity.EntityTypeB;
 
 public class EnemyFighter extends GameObject implements EntityTypeB{
@@ -12,7 +13,7 @@ public class EnemyFighter extends GameObject implements EntityTypeB{
 	Random r = new Random();
 	private Game game;
 	private Controller controller;
-	private int speed = r.nextInt(3)+1;
+	private double speed = 0.3 + 3 * r.nextDouble() ;
 	
 	public EnemyFighter(double x, double y, Skins skin, Controller c, Game game){
 		super(x,y);
@@ -26,10 +27,13 @@ public class EnemyFighter extends GameObject implements EntityTypeB{
 	
 	public void tick(){
 		x -= speed;
-		if(GamePhysics.Collision(this, game.ea)){
-			controller.removeEntity(this);
-			
-			game.setKills(game.getKills()+1);
+		for(int n = 0; n < game.ea.size(); n++){
+			EntityTypeA tempa = game.ea.get(n);
+			if(GamePhysics.Collision(this, tempa)){
+				controller.removeEntity(this);
+				controller.removeEntity(tempa);
+				game.setKills(game.getKills()+1);
+			}
 		}
 	}
 	public void render(Graphics g){
diff --git a/src/main/EnemyLaser.java b/src/main/EnemyLaser.java
new file mode 100644
index 0000000..c441ba2
--- /dev/null
+++ b/src/main/EnemyLaser.java
@@ -0,0 +1,34 @@
+package main;
+
+import java.awt.Graphics;
+import java.awt.Rectangle;
+
+import entity.EntityTypeD;
+
+public class EnemyLaser extends GameObject implements EntityTypeD{
+	
+	private Skins skin;
+	public EnemyLaser(double x, double y, Skins skin, Game game){
+		super(x,y);
+		this.skin = skin;
+		
+	}
+	
+	public void tick(){
+		x-=4;
+	}
+	public void render(Graphics g){
+		g.drawImage(skin.enemyLaser, (int)x, (int)y, null);
+	}
+	public double getX(){
+		return x;
+	}
+
+	public double getY() {
+		return y;
+	}
+	public Rectangle getBounds(){
+		return new Rectangle((int)x, (int) y, 64, 64);
+	}
+
+}
diff --git a/src/main/Game.java b/src/main/Game.java
index 0e56586..82b02ba 100644
--- a/src/main/Game.java
+++ b/src/main/Game.java
@@ -15,6 +15,8 @@ import javax.swing.JFrame;
 
 import entity.EntityTypeA;
 import entity.EntityTypeB;
+import entity.EntityTypeC;
+import entity.EntityTypeD;
 
 public class Game extends Canvas implements Runnable{
 	
@@ -36,8 +38,12 @@ public class Game extends Canvas implements Runnable{
 	
 	private int enemy_count = 1;
 	private int kills = 0;
+	private int SDcount = 0;
 	public LinkedList<EntityTypeA> ea;
 	public LinkedList<EntityTypeB> eb;
+	public LinkedList<EntityTypeC> ec;
+	public LinkedList<EntityTypeD> ed;
+
 	
 	Random r = new Random();
 
@@ -72,6 +78,9 @@ public class Game extends Canvas implements Runnable{
 		c = new Controller(tp, this);
 		ea = c.getEntityA();
 		eb = c.getEntityB();
+		ec = c.getEntityC();
+		ed = c.getEntityD();
+		c.createStarDestroyer(1);
 		c.createEnemy(enemy_count);
 	}
 	
diff --git a/src/main/GamePhysics.java b/src/main/GamePhysics.java
index 84d204c..20a5745 100644
--- a/src/main/GamePhysics.java
+++ b/src/main/GamePhysics.java
@@ -4,22 +4,31 @@ import java.util.LinkedList;
 
 import entity.EntityTypeA;
 import entity.EntityTypeB;
+import entity.EntityTypeC;
 
 public class GamePhysics {
-	public static boolean Collision(EntityTypeA enta, LinkedList<EntityTypeB> bb){
-		for(int n = 0; n <bb.size(); n++ ){
-			if(enta.getBounds().intersects(bb.get(n).getBounds())){
-				return true;
-			}
+	public static boolean Collision(EntityTypeA enta, EntityTypeB bb){
+		
+		if(enta.getBounds().intersects(bb.getBounds())){
+			return true;
+		}
+		
+		return false;
+	}
+	public static boolean Collision(EntityTypeB entb, EntityTypeA aa){
+		if(entb.getBounds().intersects(aa.getBounds())){
+				
+			return true;
+			
 		}
 		return false;
 	}
-	public static boolean Collision(EntityTypeB entb, LinkedList<EntityTypeA> aa){
-		for(int n = 0; n <aa.size(); n++ ){
-			if(entb.getBounds().intersects(aa.get(n).getBounds())){
+	public static boolean Collision(EntityTypeC entc, EntityTypeA aa){
+		
+			if(entc.getBounds().intersects(aa.getBounds())){
 				return true;
 			}
-		}
+		
 		return false;
 	}
 }
diff --git a/src/main/Player.java b/src/main/Player.java
index fc6a9ea..59f9de6 100644
--- a/src/main/Player.java
+++ b/src/main/Player.java
@@ -35,9 +35,7 @@ public class Player extends GameObject implements EntityTypeA{
 		if (y >= 536){
 			y = 536;
 		}
-		if(GamePhysics.Collision(this, game.eb)){
-			System.out.println("LOSE");
-		}
+		
 	}
 	
 	public void render(Graphics g){
diff --git a/src/main/Player2.java b/src/main/Player2.java
index add2d57..8177e16 100644
--- a/src/main/Player2.java
+++ b/src/main/Player2.java
@@ -35,9 +35,7 @@ public class Player2 extends GameObject implements EntityTypeA{
 		if (y >= 536){
 			y = 536;
 		}
-		if(GamePhysics.Collision(this, game.eb)){
-			System.out.println("LOSE");
-		}
+		
 	}
 	
 	public void render(Graphics g){
diff --git a/src/main/Skins.java b/src/main/Skins.java
index d584c52..a7ebd03 100644
--- a/src/main/Skins.java
+++ b/src/main/Skins.java
@@ -11,8 +11,10 @@ public class Skins {
 	public BufferedImage player;
 	public BufferedImage laser;
 	public BufferedImage enemy1;
-	public BufferedImage padraic;
+	public BufferedImage starDestroyer;
 	public BufferedImage player2;
+	public BufferedImage enemyLaser;
+	
 	Game game;
 	
 	private SpriteSheet ss = null;
@@ -29,11 +31,14 @@ public class Skins {
 			laser = ss.grabimage(3, 2, 64, 64);
 			enemy1 = ss.grabimage(1, 3, 64, 64);
 			player2 = ss.grabimage(2, 2, 64, 64);
+			enemyLaser = ss.grabimage(3, 2, 64, 64);
 		}else{
 		player = ss.grabimage(playerx, playery, 64, 64);
 		laser = ss.grabimage(2, 3, 64, 64);
 		enemy1 = ss.grabimage(2, 1, 64, 64);
 		player2 = ss.grabimage(3, 1, 64, 64);
+		starDestroyer = ss.grabimage(3, 3, 128, 128);
+		enemyLaser = ss.grabimage(1, 4, 64, 64);
 		}
 	}
 	
diff --git a/src/main/StarDestroyer.java b/src/main/StarDestroyer.java
new file mode 100644
index 0000000..d1e593e
--- /dev/null
+++ b/src/main/StarDestroyer.java
@@ -0,0 +1,67 @@
+package main;
+
+import java.awt.Graphics;
+import java.awt.Rectangle;
+import java.util.Random;
+
+import entity.EntityTypeA;
+import entity.EntityTypeC;
+
+public class StarDestroyer extends GameObject implements EntityTypeC{
+
+	private Skins skin;
+	private Game game;
+	private Controller controller;
+	private double speed = 0.3;
+	private int health = 10;
+	private int is_shooting = 0;
+	Random r = new Random();
+	
+	public StarDestroyer(double x, double y, Skins skin, Controller c, Game game){
+		super(x,y);
+		this.game = game;
+		this.controller = c;
+		this.skin = skin;
+	}
+	public double getX(){
+		return x;
+	}
+	
+	public void tick(){
+		x -= speed;
+		shoot();
+		for(int n = 0; n < game.ea.size(); n++){
+		EntityTypeA tempa = game.ea.get(n);
+		
+		if(GamePhysics.Collision(this, tempa)){
+			if(health ==1)
+				{controller.removeEntity(this);
+				game.setKills(game.getKills()+1);}
+			else{health--;}
+			controller.removeEntity(tempa);
+			}
+		}
+		
+	}
+	public void shoot(){
+		if(is_shooting == 0){
+		controller.addEntity(new EnemyLaser(x, y, skin, game));
+		is_shooting++;
+		}
+		else if(is_shooting == r.nextDouble()* 60 + 60){
+			is_shooting = 0;
+		}
+		else{
+			is_shooting++;
+		}
+	}
+	public void render(Graphics g){
+		g.drawImage(skin.starDestroyer, (int)x, (int)y, null);
+	}
+	public double getY() {
+		return y;
+	}
+	public Rectangle getBounds(){
+		return new Rectangle((int)x, (int) y, 64, 64);
+	}
+}