/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
var LegoBrick = Container.expand(function (primeNumber) {
	var self = Container.call(this);
	self.primeNumber = primeNumber;
	self.isConnected = false;
	self.connectedBricks = [];
	self.snapDistance = 30;
	// Create brick graphics
	var brickGraphics = self.attachAsset('brick_' + primeNumber, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Create number text
	var numberText = new Text2(primeNumber.toString(), {
		size: 40,
		fill: 0xFFFFFF
	});
	numberText.anchor.set(0.5, 0.5);
	self.addChild(numberText);
	self.checkForConnections = function () {
		for (var i = 0; i < allBricks.length; i++) {
			var otherBrick = allBricks[i];
			if (otherBrick === self) continue;
			var distance = Math.sqrt(Math.pow(self.x - otherBrick.x, 2) + Math.pow(self.y - otherBrick.y, 2));
			// Check if bricks are overlapping (more lenient for stacking)
			var isOverlapping = distance < Math.max(self.snapDistance, 80);
			var wasConnected = self.isConnectedTo(otherBrick);
			if (isOverlapping && !wasConnected) {
				// Bricks just started overlapping - show multiplication
				var product = self.primeNumber * otherBrick.primeNumber;
				multiplicationBoard.setText(self.primeNumber + ' × ' + otherBrick.primeNumber + ' = ' + product);
				self.connectTo(otherBrick);
			} else if (!isOverlapping && wasConnected) {
				// Bricks separated - show zero
				multiplicationBoard.setText('0');
				self.disconnectFrom(otherBrick);
			}
		}
	};
	self.isConnectedTo = function (brick) {
		return self.connectedBricks.indexOf(brick) !== -1;
	};
	self.connectTo = function (brick) {
		if (self.isConnectedTo(brick)) return;
		self.connectedBricks.push(brick);
		brick.connectedBricks.push(self);
		// Snap bricks together - position one on top of the other
		var targetY = Math.min(self.y, brick.y) - Math.max(self.height, brick.height) / 4;
		if (self.y > brick.y) {
			// Self is lower, move it on top of brick
			tween(self, {
				y: brick.y - (self.height + brick.height) / 2 - 10
			}, {
				duration: 300,
				easing: tween.easeOut
			});
		} else {
			// Brick is lower, move it on top of self
			tween(brick, {
				y: self.y - (self.height + brick.height) / 2 - 10
			}, {
				duration: 300,
				easing: tween.easeOut
			});
		}
		// Visual feedback
		tween(self, {
			scaleX: 1.1,
			scaleY: 1.1
		}, {
			duration: 200,
			easing: tween.easeOut
		});
		tween(self, {
			scaleX: 1.0,
			scaleY: 1.0
		}, {
			duration: 200,
			easing: tween.easeOut
		});
		LK.getSound('connect').play();
		// Award points
		LK.setScore(LK.getScore() + 10);
		scoreText.setText(LK.getScore());
	};
	self.disconnectFrom = function (brick) {
		var index = self.connectedBricks.indexOf(brick);
		if (index !== -1) {
			self.connectedBricks.splice(index, 1);
		}
		var otherIndex = brick.connectedBricks.indexOf(self);
		if (otherIndex !== -1) {
			brick.connectedBricks.splice(otherIndex, 1);
		}
		LK.getSound('disconnect').play();
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB
});

/**** 
* Game Code
****/ 
var primeNumbers = [2, 3, 5, 7, 11];
var allBricks = [];
var draggedBrick = null;
// Create display board for multiplication results
var multiplicationBoard = new Text2('Product: -', {
	size: 80,
	fill: 0xFFFFFF
});
multiplicationBoard.anchor.set(0.5, 0);
LK.gui.top.addChild(multiplicationBoard);
multiplicationBoard.y = 60;
// Create score display
var scoreText = new Text2('0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreText);
scoreText.y = 160;
// Create instructions
var instructionText = new Text2('Drag bricks together to connect them!', {
	size: 40,
	fill: 0xFFFFFF
});
instructionText.anchor.set(0.5, 0);
LK.gui.top.addChild(instructionText);
instructionText.y = 220;
// Create Lego bricks in bottom half of screen (3 of each prime number)
for (var i = 0; i < primeNumbers.length; i++) {
	for (var j = 0; j < 3; j++) {
		// Create 3 of each brick
		var brick = new LegoBrick(primeNumbers[i]);
		// Position bricks randomly in bottom half
		var margin = 200;
		brick.x = margin + Math.random() * (2048 - 2 * margin);
		brick.y = 1366 + Math.random() * (1366 - margin); // Bottom half: 1366-2732
		allBricks.push(brick);
		game.addChild(brick);
	}
}
// Mouse/touch event handlers
game.down = function (x, y, obj) {
	// Find the topmost brick at this position
	for (var i = allBricks.length - 1; i >= 0; i--) {
		var brick = allBricks[i];
		// Simple distance-based hit detection
		var distance = Math.sqrt(Math.pow(x - brick.x, 2) + Math.pow(y - brick.y, 2));
		if (distance <= Math.max(brick.width, brick.height) / 2) {
			draggedBrick = brick;
			// Bring to front by removing and re-adding
			game.removeChild(brick);
			game.addChild(brick);
			break;
		}
	}
};
game.move = function (x, y, obj) {
	if (draggedBrick) {
		draggedBrick.x = x;
		draggedBrick.y = y;
		// Keep brick within bounds and in bottom half
		draggedBrick.x = Math.max(draggedBrick.width / 2, Math.min(2048 - draggedBrick.width / 2, draggedBrick.x));
		draggedBrick.y = Math.max(1366 + draggedBrick.height / 2, Math.min(2732 - draggedBrick.height / 2, draggedBrick.y));
	}
};
game.up = function (x, y, obj) {
	if (draggedBrick) {
		draggedBrick.checkForConnections();
		draggedBrick = null;
	}
};
game.update = function () {
	// Update score display
	scoreText.setText(LK.getScore());
};

===================================================================
--- original.js
+++ change.js
@@ -113,9 +113,9 @@
 
 /**** 
 * Game Code
 ****/ 
-var primeNumbers = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29];
+var primeNumbers = [2, 3, 5, 7, 11];
 var allBricks = [];
 var draggedBrick = null;
 // Create display board for multiplication results
 var multiplicationBoard = new Text2('Product: -', {