CHALLENGE rule randomly generates challenges.

src/dk/itu/mario/level/FitnessEvaluator.java

@@ -9,6 +9,6 @@ public class FitnessEvaluator {
 		System.out.println("Evaluating LevelParseTree for fitness");
 		List<LevelComponent> levelTemplate = parseTree.getLevelTemplate();
 		//a good level has 8-16 components, plus some additional complexity depending on the player's skill level
-		return levelTemplate.size() > 7 && levelTemplate.size() < 17;
+		return levelTemplate.size() > 9 && levelTemplate.size() < 25;
 	}
 }

src/dk/itu/mario/level/LevelComponent.java

@@ -2,7 +2,26 @@ package dk.itu.mario.level;
 
 public class LevelComponent {
 	public enum TYPE {
-		BLOCKS, COINS, FLAT_HI, FLAT_LO, FLAT_SAFE, HI_LO, HI_PATH, LEVEL_SEGMENT, LEVEL, LO_HI, LO_PATH, MAZE, PIPE_JUMP, PLATFORM_JUMP, POWER_UP
+		BLOCKS,
+		BOWLING_ALLEY, 
+		CANNON_LINE, 
+		COIN_DIVE, 
+		FLAT_HI,
+		FLAT_LO, 
+		FLAT_SAFE,
+		HI_LO,
+		HI_PATH,
+		LEMMING_TRAP,
+		LEVEL_SEGMENT, 
+		LEVEL,
+		LO_HI,
+		LO_PATH, 
+		MAZE, 
+		PIPE_JUMP, 
+		PLATFORM_JUMP, 
+		POWER_UP,
+		SINGLE_PIT,
+		CHALLENGE
 	};
 
 	public enum MazeLevel {

src/dk/itu/mario/level/PCGLevel.java

@@ -1145,6 +1145,28 @@ public class PCGLevel extends Level {
 					case MAZE:
 						length += buildMaze(length, width - 64 - length);
 						break;
+					case BLOCKS:
+						length += buildMaze(length, width - 64 - length);
+						break;
+					case BOWLING_ALLEY :
+						length += buildBowlingAlley(length, width - 64 - length);
+						break;
+					case CANNON_LINE :
+						length += buildCannonLine(length, width - 64 - length);
+						break;
+					case COIN_DIVE :
+						length += buildCoinDive(length, width - 64 - length);
+						break;
+					case LEMMING_TRAP :
+						length += buildLemmingTrap(length, width - 64 - length);
+						break;
+					case POWER_UP :
+						length += buildFreebie(length, width - 64 - length);
+						//length += buildStraight(length, lcomp.getEnd(), true);
+						break;
+					case SINGLE_PIT :
+						length += buildSinglePit(length, width - 64 - length);
+						break;
 					default:
 						System.out
 								.println("Cannot build level segment for unrecognized LevelComponent type: "

src/dk/itu/mario/level/grammar/LevelGrammarFactory.java

@@ -83,6 +83,9 @@ public class LevelGrammarFactory {
 		}
 		
 		String remainder = clause.substring(rBraceIndex);
+		if (remainder.startsWith("}, ")) {
+			remainder = remainder.substring(3);
+		}
 		List<String> rhsClauseStrings = new ArrayList<String>();
 		if (remainder.contains("(")) {
 			int nextLeftIndex = -1;