===================================================================
--- original.js
+++ change.js
@@ -1,7 +1,41 @@
 /**** 
 * Classes
 ****/ 
+var LetterPiece = Container.expand(function () {
+	var self = Container.call(this);
+	self.assetId = 'letter' + String.fromCharCode(65 + Math.floor(Math.random() * 6));
+	var pieceGraphics = self.attachAsset(self.assetId, {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.correctPosition = {
+		x: 0,
+		y: 0
+	};
+	self.isCorrect = false;
+	self.setCorrectPosition = function (x, y) {
+		self.correctPosition.x = x;
+		self.correctPosition.y = y;
+	};
+	self.checkPosition = function () {
+		if (Math.abs(self.x - self.correctPosition.x) < 10 && Math.abs(self.y - self.correctPosition.y) < 10) {
+			self.isCorrect = true;
+			self.x = self.correctPosition.x;
+			self.y = self.correctPosition.y;
+		} else {
+			self.isCorrect = false;
+		}
+	};
+	self.down = function (x, y, obj) {
+		dragNode = self;
+	};
+	self.up = function (x, y, obj) {
+		dragNode = null;
+		self.checkPosition();
+	};
+	return self;
+});
 //<Assets used in the game will automatically appear here>
 // PuzzlePiece class to represent each piece of the puzzle
 var PuzzlePiece = Container.expand(function () {
 	var self = Container.call(this);
@@ -89,9 +123,9 @@
 	});
 	pieces = [];
 	// Create new pieces for the current level
 	for (var i = 0; i < 10; i++) {
-		var piece = new PuzzlePiece();
+		var piece = new LetterPiece();
 		piece.x = Math.random() * 2048;
 		piece.y = Math.random() * 2732;
 		piece.setCorrectPosition(100 + i * 150, 100 + i * 150);
 		pieces.push(piece);