===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,280 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Ball = Container.expand(function () {
+	var self = Container.call(this);
+	var graphics = self.attachAsset('ball', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.velocityX = 0;
+	self.velocityY = 0;
+	self.gravity = 0.6;
+	self.bounceX = 0.8;
+	self.bounceY = 0.7;
+	self.groundY = 2432;
+	self.lastHitBy = null;
+	self.hit = function (character, forceX, forceY) {
+		self.velocityX = forceX;
+		self.velocityY = forceY;
+		self.lastHitBy = character;
+	};
+	self.update = function () {
+		// Apply gravity
+		self.velocityY += self.gravity;
+		// Update position
+		self.x += self.velocityX;
+		self.y += self.velocityY;
+		// Ground bounce
+		if (self.y >= self.groundY - 30) {
+			self.y = self.groundY - 30;
+			self.velocityY *= -self.bounceY;
+			self.velocityX *= self.bounceX;
+			LK.getSound('bounce').play();
+		}
+		// Side boundaries
+		if (self.x <= 30) {
+			self.x = 30;
+			self.velocityX *= -self.bounceX;
+		} else if (self.x >= 2018) {
+			self.x = 2018;
+			self.velocityX *= -self.bounceX;
+		}
+		// Net collision
+		if (self.x > 1014 && self.x < 1034 && self.y > 2132) {
+			if (self.velocityX > 0) {
+				self.x = 1014;
+			} else {
+				self.x = 1034;
+			}
+			self.velocityX *= -self.bounceX;
+		}
+	};
+	return self;
+});
+var Crewmate = Container.expand(function () {
+	var self = Container.call(this);
+	var graphics = self.attachAsset('crewmate', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	self.velocityY = 0;
+	self.isGrounded = false;
+	self.jumpPower = -18;
+	self.gravity = 0.8;
+	self.groundY = 2432;
+	self.speed = 8;
+	self.courtMinX = 50;
+	self.courtMaxX = 974;
+	self.jump = function () {
+		if (self.isGrounded) {
+			self.velocityY = self.jumpPower;
+			self.isGrounded = false;
+		}
+	};
+	self.moveLeft = function () {
+		if (self.x > self.courtMinX) {
+			self.x -= self.speed;
+		}
+	};
+	self.moveRight = function () {
+		if (self.x < self.courtMaxX) {
+			self.x += self.speed;
+		}
+	};
+	self.update = function () {
+		// Apply gravity
+		self.velocityY += self.gravity;
+		self.y += self.velocityY;
+		// Ground collision
+		if (self.y >= self.groundY) {
+			self.y = self.groundY;
+			self.velocityY = 0;
+			self.isGrounded = true;
+		}
+	};
+	return self;
+});
+var Opponent = Container.expand(function () {
+	var self = Container.call(this);
+	var graphics = self.attachAsset('opponent', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	self.velocityY = 0;
+	self.isGrounded = false;
+	self.jumpPower = -18;
+	self.gravity = 0.8;
+	self.groundY = 2432;
+	self.speed = 6;
+	self.courtMinX = 1074;
+	self.courtMaxX = 1998;
+	self.lastJumpTime = 0;
+	self.jump = function () {
+		if (self.isGrounded && LK.ticks - self.lastJumpTime > 30) {
+			self.velocityY = self.jumpPower;
+			self.isGrounded = false;
+			self.lastJumpTime = LK.ticks;
+		}
+	};
+	self.update = function () {
+		// Apply gravity
+		self.velocityY += self.gravity;
+		self.y += self.velocityY;
+		// Ground collision
+		if (self.y >= self.groundY) {
+			self.y = self.groundY;
+			self.velocityY = 0;
+			self.isGrounded = true;
+		}
+		// AI behavior
+		if (ball) {
+			var distanceToBall = Math.abs(self.x - ball.x);
+			// Move towards ball if it's on opponent's side
+			if (ball.x > 1024) {
+				if (ball.x > self.x && self.x < self.courtMaxX) {
+					self.x += self.speed;
+				} else if (ball.x < self.x && self.x > self.courtMinX) {
+					self.x -= self.speed;
+				}
+				// Jump if ball is close and low enough
+				if (distanceToBall < 150 && ball.y > 2200 && ball.velocityY > 0) {
+					self.jump();
+				}
+			}
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87CEEB
+});
+
+/**** 
+* Game Code
+****/ 
+// Game variables
+var player;
+var opponent;
+var ball;
+var net;
+var ground;
+var playerScore = 0;
+var opponentScore = 0;
+var dragNode = null;
+var gameWinScore = 11;
+// Create ground
+ground = game.addChild(LK.getAsset('ground', {
+	anchorX: 0,
+	anchorY: 1,
+	x: 0,
+	y: 2482
+}));
+// Create net
+net = game.addChild(LK.getAsset('net', {
+	anchorX: 0.5,
+	anchorY: 1,
+	x: 1024,
+	y: 2432
+}));
+// Create player
+player = game.addChild(new Crewmate());
+player.x = 512;
+player.y = 2432;
+// Create opponent
+opponent = game.addChild(new Opponent());
+opponent.x = 1536;
+opponent.y = 2432;
+// Create ball
+ball = game.addChild(new Ball());
+ball.x = 1024;
+ball.y = 2200;
+// Create score display
+var scoreText = new Text2('Player: 0  |  Opponent: 0', {
+	size: 80,
+	fill: 0xFFFFFF
+});
+scoreText.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreText);
+function updateScore() {
+	scoreText.setText('Player: ' + playerScore + '  |  Opponent: ' + opponentScore);
+}
+function resetBall() {
+	ball.x = 1024;
+	ball.y = 2200;
+	ball.velocityX = 0;
+	ball.velocityY = 0;
+}
+function checkScore() {
+	// Check if ball hits player's court
+	if (ball.y >= 2400 && ball.x < 1024) {
+		opponentScore++;
+		LK.getSound('score').play();
+		updateScore();
+		resetBall();
+		if (opponentScore >= gameWinScore) {
+			LK.showGameOver();
+		}
+	}
+	// Check if ball hits opponent's court
+	else if (ball.y >= 2400 && ball.x > 1024) {
+		playerScore++;
+		LK.setScore(playerScore);
+		LK.getSound('score').play();
+		updateScore();
+		resetBall();
+		if (playerScore >= gameWinScore) {
+			LK.showYouWin();
+		}
+	}
+}
+function handleMove(x, y, obj) {
+	if (dragNode) {
+		dragNode.x = x;
+		// Keep player in bounds
+		if (dragNode.x < dragNode.courtMinX) {
+			dragNode.x = dragNode.courtMinX;
+		} else if (dragNode.x > dragNode.courtMaxX) {
+			dragNode.x = dragNode.courtMaxX;
+		}
+	}
+}
+game.move = handleMove;
+game.down = function (x, y, obj) {
+	// Check if touching player's side for dragging
+	if (x < 1024) {
+		dragNode = player;
+		handleMove(x, y, obj);
+	}
+};
+game.up = function (x, y, obj) {
+	// Jump on touch release
+	if (dragNode) {
+		dragNode.jump();
+	}
+	dragNode = null;
+};
+game.update = function () {
+	// Check ball collision with player
+	if (player.intersects(ball) && ball.lastHitBy !== player) {
+		var forceX = (ball.x - player.x) * 0.3 + 8;
+		var forceY = -12;
+		ball.hit(player, forceX, forceY);
+	}
+	// Check ball collision with opponent
+	if (opponent.intersects(ball) && ball.lastHitBy !== opponent) {
+		var forceX = (ball.x - opponent.x) * 0.3 - 8;
+		var forceY = -12;
+		ball.hit(opponent, forceX, forceY);
+	}
+	checkScore();
+};
\ No newline at end of file