fixed small syntax issue with missing this.

GameProject/src/playground/BreakoutLevelBase.java

@@ -127,7 +127,7 @@ public abstract class BreakoutLevelBase extends Playground {
 
     if (this.ego.collisionDetection(ball)) {
       logger.trace("Collision detected of ball and ego");
-      actionIfBallHitsEgo(this.ball, this.ego);
+      this.actionIfBallHitsEgo(this.ball, this.ego);
     }
   }