edit class MultiLevelGame and 4 levels

GameProject/src/base/MultiLevelGame.java

@@ -0,0 +1,26 @@
+package base;
+
+import java.io.IOException;
+
+import playground.Level1;
+import playground.Level3;
+import playground.LevelBoss;
+import playground.LevelHitTwice;
+
+public class MultiLevelGame extends GameLoop{
+	@Override
+	
+	void defineLevels() {  
+	    this.resetLevels();
+	    this.addLevel(new Level1());
+	    this.addLevel(new LevelHitTwice());
+	    this.addLevel(new Level3());
+	    this.addLevel(new LevelBoss());
+	  }
+	
+	public static void main(String[] args) throws IOException {
+	    GameLoop mlg = new MultiLevelGame();    
+	    mlg.runGame(args);
+	  }
+}
+