===================================================================
--- original.js
+++ change.js
@@ -47,12 +47,12 @@
 	blackBlocks.push(blackBlock);
 	game.addChild(blackBlock);
 }
 
-// Event listener for left click to create building blocks
+// Event listener for left click to create black blocks
 game.on('mousedown', function (obj) {
 	var pos = obj.event.getLocalPosition(game);
-	createBlock(pos.x, pos.y);
+	createBlackBlock(pos.x, pos.y);
 });
 
 // Event listener for right up to create black blocks
 game.on('rightup', function (obj) {