var Circle = Container.expand(function () {
	var self = Container.call(this);
	var circleGraphics = self.createAsset('circle', 'Circle Graphics', .5, .5);
	self.matched = false;
	self.match = function () {
		self.matched = true;
	};
});
var Square = Container.expand(function () {
	var self = Container.call(this);
	var squareGraphics = self.createAsset('square', 'Square Graphics', .5, .5);
	self.matched = false;
	self.match = function () {
		self.matched = true;
	};
});
var Triangle = Container.expand(function () {
	var self = Container.call(this);
	var triangleGraphics = self.createAsset('triangle', 'Triangle Graphics', .5, .5);
	self.matched = false;
	self.match = function () {
		self.matched = true;
	};
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.createAsset('player', 'Player Graphics', .5, .5);
	self.score = 0;
	self.shape = 'circle';
	self.incrementScore = function () {
		self.score += 1;
	};
	self.changeShape = function () {
		if (self.shape === 'circle') {
			self.shape = 'square';
		} else if (self.shape === 'square') {
			self.shape = 'triangle';
		} else {
			self.shape = 'circle';
		}
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var shapes = [];
	var player = self.addChild(new Player());
	player.x = 2048 / 2;
	player.y = 2732 / 2;
	var scoreTxt = new Text2('0', {
		size: 150,
		fill: "#ffffff"
	});
	scoreTxt.setText(player.score);
	scoreTxt.anchor.set(.5, 0);
	LK.gui.topCenter.addChild(scoreTxt);
	LK.on('tick', function () {
		for (var a = shapes.length - 1; a >= 0; a--) {
			if (shapes[a] && shapes[a].matched) {
				shapes[a].destroy();
				shapes.splice(a, 1);
				player.incrementScore();
				scoreTxt.setText(player.score);
			}
		}
		if (LK.ticks % 60 == 0) {
			var newShape = new Shape();
			newShape.x = Math.random() * 2048;
			newShape.y = Math.random() * 2732;
			shapes.push(newShape);
			self.addChild(newShape);
		}
	});
	stage.on('down', function (obj) {
		player.changeShape();
		var event = obj.event;
		var pos = event.getLocalPosition(self);
		for (var a = shapes.length - 1; a >= 0; a--) {
			if (shapes[a] && shapes[a].containsPoint({
				x: pos.x,
				y: pos.y
			}) && shapes[a] instanceof window[player.shape]) {
				shapes[a].match();
			}
		}
	});
});

===================================================================
--- original.js
+++ change.js
@@ -1,19 +1,45 @@
-var Shape = Container.expand(function () {
+var Circle = Container.expand(function () {
 	var self = Container.call(this);
-	var shapeGraphics = self.createAsset('shape', 'Shape Graphics', .5, .5);
+	var circleGraphics = self.createAsset('circle', 'Circle Graphics', .5, .5);
 	self.matched = false;
 	self.match = function () {
 		self.matched = true;
 	};
 });
+var Square = Container.expand(function () {
+	var self = Container.call(this);
+	var squareGraphics = self.createAsset('square', 'Square Graphics', .5, .5);
+	self.matched = false;
+	self.match = function () {
+		self.matched = true;
+	};
+});
+var Triangle = Container.expand(function () {
+	var self = Container.call(this);
+	var triangleGraphics = self.createAsset('triangle', 'Triangle Graphics', .5, .5);
+	self.matched = false;
+	self.match = function () {
+		self.matched = true;
+	};
+});
 var Player = Container.expand(function () {
 	var self = Container.call(this);
 	var playerGraphics = self.createAsset('player', 'Player Graphics', .5, .5);
 	self.score = 0;
+	self.shape = 'circle';
 	self.incrementScore = function () {
 		self.score += 1;
 	};
+	self.changeShape = function () {
+		if (self.shape === 'circle') {
+			self.shape = 'square';
+		} else if (self.shape === 'square') {
+			self.shape = 'triangle';
+		} else {
+			self.shape = 'circle';
+		}
+	};
 });
 var Game = Container.expand(function () {
 	var self = Container.call(this);
 	var shapes = [];
@@ -44,15 +70,16 @@
 			self.addChild(newShape);
 		}
 	});
 	stage.on('down', function (obj) {
+		player.changeShape();
 		var event = obj.event;
 		var pos = event.getLocalPosition(self);
 		for (var a = shapes.length - 1; a >= 0; a--) {
 			if (shapes[a] && shapes[a].containsPoint({
 				x: pos.x,
 				y: pos.y
-			})) {
+			}) && shapes[a] instanceof window[player.shape]) {
 				shapes[a].match();
 			}
 		}
 	});