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

/**** 
* Classes
****/ 
var Ball = Container.expand(function () {
	var self = Container.call(this);
	var ballGraphics = self.attachAsset('ball', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityX = 0;
	self.velocityY = 0;
	self.speed = 8;
	self.maxSpeed = 15;
	self.lastX = 0;
	self.lastY = 0;
	self.update = function () {
		// Store last position for collision detection
		self.lastX = self.x;
		self.lastY = self.y;
		self.x += self.velocityX;
		self.y += self.velocityY;
		// Bounce off left and right walls
		if (self.x <= 40 || self.x >= 2048 - 40) {
			self.velocityX = -self.velocityX;
			self.x = self.x <= 40 ? 40 : 2048 - 40;
		}
		// Bounce off top and bottom walls (but not in goal areas)
		if (self.y <= 40 && (self.x < 824 || self.x > 1224) || self.y >= 2732 - 40 && (self.x < 824 || self.x > 1224)) {
			self.velocityY = -self.velocityY;
			self.y = self.y <= 40 ? 40 : 2732 - 40;
		}
	};
	self.reset = function () {
		self.x = 1024;
		self.y = 1366;
		self.velocityX = 0;
		self.velocityY = 0;
	};
	return self;
});
var Paddle = Container.expand(function (isPlayer) {
	var self = Container.call(this);
	var paddleGraphics = self.attachAsset(isPlayer ? 'playerPaddle' : 'aiPaddle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.isPlayer = isPlayer;
	self.lastX = 0;
	self.lastY = 0;
	self.update = function () {
		self.lastX = self.x;
		self.lastY = self.y;
		// Keep paddle in bounds
		if (self.x < 80) self.x = 80;
		if (self.x > 2048 - 80) self.x = 2048 - 80;
		if (self.isPlayer) {
			// Player paddle stays in bottom half
			if (self.y < 1366 + 100) self.y = 1366 + 100;
			if (self.y > 2732 - 80) self.y = 2732 - 80;
		} else {
			// AI paddle stays in top half
			if (self.y < 80) self.y = 80;
			if (self.y > 1366 - 100) self.y = 1366 - 100;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
// Game variables
var game = new LK.Game({
	backgroundColor: 0x228B22
});

/**** 
* Game Code
****/ 
// Game variables
var level = 1;
var playerScore = 0;
var aiScore = 0;
var goalsToWin = 3;
var gameState = 'playing';
// Create checkered grass field background with smaller squares
var grassSquares = [];
for (var row = 0; row < 22; row++) {
	for (var col = 0; col < 16; col++) {
		var isLight = (row + col) % 2 === 0;
		var grassSquare = game.addChild(LK.getAsset(isLight ? 'grassSquareLight' : 'grassSquareDark', {
			anchorX: 0,
			anchorY: 0,
			x: col * 64,
			y: row * 64,
			scaleX: 0.5,
			scaleY: 0.5
		}));
		grassSquares.push(grassSquare);
	}
}
// Create center circle outline (soccer field style)
var centerCircleOutline = game.addChild(LK.getAsset('centerCircle', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 1366,
	scaleX: 0.8,
	scaleY: 0.8
}));
// Make center circle just an outline
centerCircleOutline.alpha = 0;
// Create center circle line using multiple small white boxes in a circle
var centerCircleRadius = 150;
var circleSegments = 40;
for (var i = 0; i < circleSegments; i++) {
	var angle = i / circleSegments * Math.PI * 2;
	var lineX = 1024 + Math.cos(angle) * centerCircleRadius;
	var lineY = 1366 + Math.sin(angle) * centerCircleRadius;
	var circleSegment = game.addChild(LK.getAsset('fieldLine', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: lineX,
		y: lineY,
		scaleX: 0.02,
		scaleY: 0.5,
		rotation: angle
	}));
}
// Create center dot
var centerDot = game.addChild(LK.getAsset('ball', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 1366,
	scaleX: 0.2,
	scaleY: 0.2
}));
// Create field elements
var centerLine = game.addChild(LK.getAsset('fieldLine', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 1366
}));
// Create top goal (AI goal)
var topGoalPost = game.addChild(LK.getAsset('goalPost', {
	anchorX: 0.5,
	anchorY: 1.0,
	x: 1024,
	y: 80
}));
var topGoalNet = game.addChild(LK.getAsset('goalNet', {
	anchorX: 0.5,
	anchorY: 1.0,
	x: 1024,
	y: 20
}));
// Create bottom goal (Player goal)
var bottomGoalPost = game.addChild(LK.getAsset('goalPost', {
	anchorX: 0.5,
	anchorY: 0.0,
	x: 1024,
	y: 2652
}));
var bottomGoalNet = game.addChild(LK.getAsset('goalNet', {
	anchorX: 0.5,
	anchorY: 0.0,
	x: 1024,
	y: 2712
}));
// Create game objects
var ball = game.addChild(new Ball());
var playerPaddle = game.addChild(new Paddle(true));
var aiPaddle = game.addChild(new Paddle(false));
// Position initial objects
ball.reset();
playerPaddle.x = 1024;
playerPaddle.y = 2200;
aiPaddle.x = 1024;
aiPaddle.y = 532;
// Create UI
var levelText = new Text2('Level ' + level, {
	size: 80,
	fill: 0xFFFFFF
});
levelText.anchor.set(0.5, 0);
LK.gui.top.addChild(levelText);
var scoreText = new Text2('You: ' + playerScore + ' - AI: ' + aiScore, {
	size: 60,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0.5, 0);
scoreText.y = 100;
LK.gui.top.addChild(scoreText);
// Touch controls
var dragPaddle = null;
game.down = function (x, y, obj) {
	var distance = Math.sqrt(Math.pow(x - playerPaddle.x, 2) + Math.pow(y - playerPaddle.y, 2));
	if (distance < 120) {
		dragPaddle = playerPaddle;
	}
};
game.move = function (x, y, obj) {
	if (dragPaddle && gameState === 'playing') {
		dragPaddle.x = x;
		dragPaddle.y = y;
	}
};
game.up = function (x, y, obj) {
	dragPaddle = null;
};
game.update = function () {
	if (gameState !== 'playing') return;
	// AI Logic - track ball with increasing difficulty
	var aiSpeed = 3 + (level - 1) * 0.5;
	var ballTargetX = ball.x + ball.velocityX * 10; // Predict ball position
	if (aiPaddle.x < ballTargetX - 20) {
		aiPaddle.x += aiSpeed;
	} else if (aiPaddle.x > ballTargetX + 20) {
		aiPaddle.x -= aiSpeed;
	}
	// Ball collision with player paddle - improved collision detection
	var ballPaddleDistance = Math.sqrt(Math.pow(ball.x - playerPaddle.x, 2) + Math.pow(ball.y - playerPaddle.y, 2));
	var lastBallPaddleDistance = Math.sqrt(Math.pow(ball.lastX - playerPaddle.lastX, 2) + Math.pow(ball.lastY - playerPaddle.lastY, 2));
	var collisionRadius = 120; // Combined radius of ball and paddle
	if (ballPaddleDistance <= collisionRadius && lastBallPaddleDistance > collisionRadius || ball.intersects(playerPaddle)) {
		var dx = ball.x - playerPaddle.x;
		var dy = ball.y - playerPaddle.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0) {
			// Push ball away from paddle to prevent sticking
			var pushDistance = collisionRadius + 5;
			ball.x = playerPaddle.x + dx / distance * pushDistance;
			ball.y = playerPaddle.y + dy / distance * pushDistance;
			// Calculate new velocity
			ball.velocityX = dx / distance * ball.speed;
			ball.velocityY = dy / distance * ball.speed;
			// Add paddle momentum
			var paddleSpeedX = playerPaddle.x - playerPaddle.lastX;
			var paddleSpeedY = playerPaddle.y - playerPaddle.lastY;
			ball.velocityX += paddleSpeedX * 0.3;
			ball.velocityY += paddleSpeedY * 0.3;
			LK.getSound('hit').play();
		}
	}
	// Ball collision with AI paddle - improved collision detection
	var ballAIPaddleDistance = Math.sqrt(Math.pow(ball.x - aiPaddle.x, 2) + Math.pow(ball.y - aiPaddle.y, 2));
	var lastBallAIPaddleDistance = Math.sqrt(Math.pow(ball.lastX - aiPaddle.lastX, 2) + Math.pow(ball.lastY - aiPaddle.lastY, 2));
	var collisionRadius = 120; // Combined radius of ball and paddle
	if (ballAIPaddleDistance <= collisionRadius && lastBallAIPaddleDistance > collisionRadius || ball.intersects(aiPaddle)) {
		var dx = ball.x - aiPaddle.x;
		var dy = ball.y - aiPaddle.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0) {
			// Push ball away from paddle to prevent sticking
			var pushDistance = collisionRadius + 5;
			ball.x = aiPaddle.x + dx / distance * pushDistance;
			ball.y = aiPaddle.y + dy / distance * pushDistance;
			// Calculate new velocity
			ball.velocityX = dx / distance * ball.speed;
			ball.velocityY = dy / distance * ball.speed;
			LK.getSound('hit').play();
		}
	}
	// Goal detection
	if (ball.y <= 20 && ball.x >= 824 && ball.x <= 1224) {
		// Player scores
		playerScore++;
		LK.getSound('goal').play();
		tween(ball, {
			scaleX: 1.5,
			scaleY: 1.5
		}, {
			duration: 200,
			onFinish: function onFinish() {
				tween(ball, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 200
				});
			}
		});
		checkWinCondition();
	} else if (ball.y >= 2712 && ball.x >= 824 && ball.x <= 1224) {
		// AI scores
		aiScore++;
		LK.getSound('goal').play();
		tween(ball, {
			scaleX: 1.5,
			scaleY: 1.5
		}, {
			duration: 200,
			onFinish: function onFinish() {
				tween(ball, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 200
				});
			}
		});
		checkWinCondition();
	}
	// Increase ball speed over time in current level
	ball.speed = Math.min(ball.maxSpeed, 8 + (level - 1) * 1.5);
	// Update score display
	scoreText.setText('You: ' + playerScore + ' - AI: ' + aiScore);
};
function checkWinCondition() {
	if (playerScore >= goalsToWin) {
		// Player wins level
		level++;
		playerScore = 0;
		aiScore = 0;
		levelText.setText('Level ' + level);
		// Flash screen green for level completion
		LK.effects.flashScreen(0x00ff00, 1000);
		// Reset positions
		ball.reset();
		playerPaddle.x = 1024;
		playerPaddle.y = 2200;
		aiPaddle.x = 1024;
		aiPaddle.y = 532;
		// Check for game completion
		if (level > 10) {
			LK.showYouWin();
		}
	} else if (aiScore >= goalsToWin) {
		// AI wins - game over
		LK.effects.flashScreen(0xff0000, 1000);
		LK.showGameOver();
	} else {
		// Continue playing - reset ball
		LK.setTimeout(function () {
			ball.reset();
		}, 1000);
	}
}

===================================================================
--- original.js
+++ change.js
@@ -15,9 +15,14 @@
 	self.velocityX = 0;
 	self.velocityY = 0;
 	self.speed = 8;
 	self.maxSpeed = 15;
+	self.lastX = 0;
+	self.lastY = 0;
 	self.update = function () {
+		// Store last position for collision detection
+		self.lastX = self.x;
+		self.lastY = self.y;
 		self.x += self.velocityX;
 		self.y += self.velocityY;
 		// Bounce off left and right walls
 		if (self.x <= 40 || self.x >= 2048 - 40) {
@@ -90,10 +95,10 @@
 		var isLight = (row + col) % 2 === 0;
 		var grassSquare = game.addChild(LK.getAsset(isLight ? 'grassSquareLight' : 'grassSquareDark', {
 			anchorX: 0,
 			anchorY: 0,
-			x: col * 128,
-			y: row * 124,
+			x: col * 64,
+			y: row * 64,
 			scaleX: 0.5,
 			scaleY: 0.5
 		}));
 		grassSquares.push(grassSquare);
@@ -219,14 +224,22 @@
 		aiPaddle.x += aiSpeed;
 	} else if (aiPaddle.x > ballTargetX + 20) {
 		aiPaddle.x -= aiSpeed;
 	}
-	// Ball collision with player paddle
-	if (ball.intersects(playerPaddle)) {
+	// Ball collision with player paddle - improved collision detection
+	var ballPaddleDistance = Math.sqrt(Math.pow(ball.x - playerPaddle.x, 2) + Math.pow(ball.y - playerPaddle.y, 2));
+	var lastBallPaddleDistance = Math.sqrt(Math.pow(ball.lastX - playerPaddle.lastX, 2) + Math.pow(ball.lastY - playerPaddle.lastY, 2));
+	var collisionRadius = 120; // Combined radius of ball and paddle
+	if (ballPaddleDistance <= collisionRadius && lastBallPaddleDistance > collisionRadius || ball.intersects(playerPaddle)) {
 		var dx = ball.x - playerPaddle.x;
 		var dy = ball.y - playerPaddle.y;
 		var distance = Math.sqrt(dx * dx + dy * dy);
 		if (distance > 0) {
+			// Push ball away from paddle to prevent sticking
+			var pushDistance = collisionRadius + 5;
+			ball.x = playerPaddle.x + dx / distance * pushDistance;
+			ball.y = playerPaddle.y + dy / distance * pushDistance;
+			// Calculate new velocity
 			ball.velocityX = dx / distance * ball.speed;
 			ball.velocityY = dy / distance * ball.speed;
 			// Add paddle momentum
 			var paddleSpeedX = playerPaddle.x - playerPaddle.lastX;
@@ -235,14 +248,22 @@
 			ball.velocityY += paddleSpeedY * 0.3;
 			LK.getSound('hit').play();
 		}
 	}
-	// Ball collision with AI paddle
-	if (ball.intersects(aiPaddle)) {
+	// Ball collision with AI paddle - improved collision detection
+	var ballAIPaddleDistance = Math.sqrt(Math.pow(ball.x - aiPaddle.x, 2) + Math.pow(ball.y - aiPaddle.y, 2));
+	var lastBallAIPaddleDistance = Math.sqrt(Math.pow(ball.lastX - aiPaddle.lastX, 2) + Math.pow(ball.lastY - aiPaddle.lastY, 2));
+	var collisionRadius = 120; // Combined radius of ball and paddle
+	if (ballAIPaddleDistance <= collisionRadius && lastBallAIPaddleDistance > collisionRadius || ball.intersects(aiPaddle)) {
 		var dx = ball.x - aiPaddle.x;
 		var dy = ball.y - aiPaddle.y;
 		var distance = Math.sqrt(dx * dx + dy * dy);
 		if (distance > 0) {
+			// Push ball away from paddle to prevent sticking
+			var pushDistance = collisionRadius + 5;
+			ball.x = aiPaddle.x + dx / distance * pushDistance;
+			ball.y = aiPaddle.y + dy / distance * pushDistance;
+			// Calculate new velocity
 			ball.velocityX = dx / distance * ball.speed;
 			ball.velocityY = dy / distance * ball.speed;
 			LK.getSound('hit').play();
 		}