diff --git a/src/main/java/lab/BulletAnimated.java b/src/main/java/lab/BulletAnimated.java
index 5523847e2994b8a0b78f3297dde3302cfaeea83f..dd27903d2b2011bef7c09c41f5b9ceda9000ce4b 100644
--- a/src/main/java/lab/BulletAnimated.java
+++ b/src/main/java/lab/BulletAnimated.java
@@ -4,7 +4,6 @@ import javafx.geometry.Point2D;
 import javafx.geometry.Rectangle2D;
 import javafx.scene.canvas.GraphicsContext;
 import javafx.scene.image.Image;
-
 public class BulletAnimated  implements DrawableSimulable, Collisionable{
 
 	private static final double STRENGTH_CANNON_COEFICIENT = 4.;
@@ -68,7 +67,7 @@ public class BulletAnimated  implements DrawableSimulable, Collisionable{
 					-1. / 2 * crossSectionalArea * Constants.AIR_DENSITY * dragCoefficient * Math.pow(speed.getX(), 2),
 					-1. / 2 * crossSectionalArea * Constants.AIR_DENSITY * 0.47 * Math.pow(speed.getY(), 2));
 			Point2D acceleration = new Point2D(-airResistanceforce.getX() * mass,
-					(-Constants.GRAVITATIONAL_ACCELERATION/30 + airResistanceforce.getY()) * mass);
+					(-Constants.GRAVITATIONAL_ACCELERATION/20 + airResistanceforce.getY()) * mass);
 			speed = speed.add(acceleration.multiply(deltaT));
 		}
 		if (!hitToGround) {
@@ -112,5 +111,9 @@ public class BulletAnimated  implements DrawableSimulable, Collisionable{
 		accelerate = true;
 		speed = initialSpeed;
 	}
+
+	public void setHitListener(HitListener hitListenerImpl) {
+		hitListener = hitListenerImpl;
+	}
 	
 }
diff --git a/src/main/java/lab/GameController.java b/src/main/java/lab/GameController.java
index c7b578b86edb768bfdc33c65e13c81466ecec266..2a23c20991e6689a9e4c3debe06e397623a1fe29 100644
--- a/src/main/java/lab/GameController.java
+++ b/src/main/java/lab/GameController.java
@@ -32,21 +32,10 @@ public class GameController {
 	}
 	
 	public void startGame() {
-		this.world = new World(canvas.getWidth(), canvas.getHeight());	
+		this.world = new World(canvas.getWidth(), canvas.getHeight());
+		this.world.setGameListener(new GameListenerImpl());
 		//Draw scene on a separate thread to avoid blocking UI.
-		animationTimer = new AnimationTimer() {
-			private Long previous;
-			
-			@Override
-			public void handle(long now) {
-				if (previous == null) {
-					previous = now;
-				} else {
-					drawScene((now - previous)/1e9);
-					previous = now;
-				}
-			}
-		};
+		animationTimer = new AnimationTimerImpl();
 		angleSlider.valueProperty().addListener(this::angleChanged);
 		world.setCannonAngle(angleSlider.getValue());
 		
@@ -80,4 +69,33 @@ public class GameController {
 			, Number oldValue, Number newValue) {
 		world.setCannonStrength(newValue.doubleValue());
 	}
+	
+	private final class AnimationTimerImpl extends AnimationTimer {
+		private Long previous;
+
+		@Override
+		public void handle(long now) {
+			if (previous == null) {
+				previous = now;
+			} else {
+				drawScene((now - previous)/1e9);
+				previous = now;
+			}
+		}
+	}
+
+	private class GameListenerImpl implements GameListener {
+
+		@Override
+		public void stateChanged(int shoots, int hits) {
+			GameController.this.shoots.setText("" + shoots);
+			GameController.this.hits.setText("" + hits);
+		}
+
+		@Override
+		public void gameOver() {
+			stopGame();
+		}
+		
+	}
 }
diff --git a/src/main/java/lab/World.java b/src/main/java/lab/World.java
index 58d0489d942a63c58979f2388ca217364380b005..9fb2e23b138fc91bc73455181e5080449975d01f 100644
--- a/src/main/java/lab/World.java
+++ b/src/main/java/lab/World.java
@@ -29,6 +29,7 @@ public class World {
 		entities = new DrawableSimulable[2 + NUMBER_OF_DRAGONS];
 		entities[0] = cannon;
 		entities[1] = new BulletAnimated(this, cannon, new Point2D(30, 60), new Point2D(0, 0), 40);
+		((BulletAnimated)entities[1]).setHitListener(this::hitOfBullet);
 		Random rnd = new Random();
 		
 		for (int i = 2; i < entities.length; i++) {
@@ -113,8 +114,21 @@ public class World {
 				ba.fire();
 				shoots++;
 				gameListener.stateChanged(shoots, hits);
+				if (shoots > 10) {
+					gameListener.gameOver();
+				}
 			}
 		}
 	}
 
+	public void setGameListener(GameListener gameListenerImpl) {
+		this.gameListener = gameListenerImpl;
+		
+	}
+	
+	private void hitOfBullet() {
+		hits++;
+		gameListener.stateChanged(shoots, hits);
+	}
+	
 }