diff --git a/core/src/com/me/brickbuster/entity/Ball.java b/core/src/com/me/brickbuster/entity/Ball.java
index be2fe4f..429730b 100644
--- a/core/src/com/me/brickbuster/entity/Ball.java
+++ b/core/src/com/me/brickbuster/entity/Ball.java
@@ -42,9 +42,9 @@ public class Ball extends Entity {
 
 		Vector2 new_pos = getPos().cpy().add(direction.cpy().scl(speed * dt));
 
-		boolean brick_collision = false;
+		boolean brickCollision = false;
 		Iterator<Brick> brickIterator = getBrickBuster().getBricks().iterator();
-		while (!brick_collision && brickIterator.hasNext()) {
+		while (!brickCollision && brickIterator.hasNext()) {
 			Brick brick = brickIterator.next();
 			Vector2[] vertices = brick.getVertices();
 			for(int i = 0; i < vertices.length; i++) {
@@ -60,7 +60,7 @@ public class Ball extends Entity {
 						speed = BOOST_SPEED;
 					}
 					Utils.reflect(direction, segment.nor());
-					brick_collision = true;
+					brickCollision = true;
 					break;
 				}
 			}
@@ -103,6 +103,7 @@ public class Ball extends Entity {
 			direction = paddleReflectAngle();
 			isStuck = false;
 		} else {
+			// launch at random angle between 135 and 45 degrees
 			float angle = MathUtils.random(MathUtils.PI/2) + MathUtils.PI/4;
 			direction = new Vector2(MathUtils.cos(angle), MathUtils.sin(angle));
 			speed = DEFAULT_SPEED;