/**** 
* 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.gravity = 0;
	self.friction = 0.98;
	self.isMoving = false;
	self.shoot = function (power, angle) {
		self.velocityX = Math.cos(angle) * power;
		self.velocityY = Math.sin(angle) * power;
		self.isMoving = true;
		LK.getSound('kick').play();
	};
	self.reset = function () {
		self.x = ballStartX;
		self.y = ballStartY;
		self.velocityX = 0;
		self.velocityY = 0;
		self.isMoving = false;
	};
	self.update = function () {
		if (self.isMoving) {
			self.x += self.velocityX;
			self.y += self.velocityY;
			// No gravity applied - ball travels in straight line
			self.velocityX *= self.friction;
			self.velocityY *= self.friction;
			// Stop if moving too slowly
			if (Math.abs(self.velocityX) < 0.1 && Math.abs(self.velocityY) < 0.1) {
				self.isMoving = false;
			}
			// Bounds checking
			if (self.x < 0 || self.x > 2048 || self.y > 2732) {
				self.isMoving = false;
				ballMissed();
			}
		}
	};
	return self;
});
var Defender = Container.expand(function () {
	var self = Container.call(this);
	var defenderGraphics = self.attachAsset('defender', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	return self;
});
var Goalkeeper = Container.expand(function () {
	var self = Container.call(this);
	var keeperGraphics = self.attachAsset('goalkeeper', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	return self;
});
var TrajectoryDot = Container.expand(function () {
	var self = Container.call(this);
	var dotGraphics = self.attachAsset('trajectory', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	dotGraphics.alpha = 0.6;
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x4a90e2
});

/**** 
* Game Code
****/ 
// Game variables
var currentRound = 1;
var attemptsLeft = 3;
var ballStartX = 1024;
var ballStartY = 2400;
var goalX = 1024;
var goalY = 400;
var isAiming = false;
var dragStartX = 0;
var dragStartY = 0;
var trajectoryDots = [];
var defenders = [];
// Create grass field
var grass = game.addChild(LK.getAsset('grass', {
	anchorX: 0,
	anchorY: 1.0,
	x: 0,
	y: 2732
}));
// Create goal posts
var leftPost = game.addChild(LK.getAsset('goalPost', {
	anchorX: 0.5,
	anchorY: 1.0,
	x: goalX - 300,
	y: goalY + 200
}));
var rightPost = game.addChild(LK.getAsset('goalPost', {
	anchorX: 0.5,
	anchorY: 1.0,
	x: goalX + 300,
	y: goalY + 200
}));
var crossbar = game.addChild(LK.getAsset('goalCrossbar', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: goalX,
	y: goalY
}));
// Create goalkeeper
var goalkeeper = game.addChild(new Goalkeeper());
goalkeeper.x = goalX;
goalkeeper.y = goalY + 180;
// Create ball
var ball = game.addChild(new Ball());
ball.reset();
// UI Elements
var roundText = new Text2('Round: 1', {
	size: 80,
	fill: 0xFFFFFF
});
roundText.anchor.set(0.5, 0);
LK.gui.top.addChild(roundText);
var attemptsText = new Text2('Attempts: 3', {
	size: 60,
	fill: 0xFFFFFF
});
attemptsText.anchor.set(1.0, 0);
LK.gui.topRight.addChild(attemptsText);
var powerText = new Text2('', {
	size: 50,
	fill: 0xFFFF00
});
powerText.anchor.set(0.5, 0.5);
game.addChild(powerText);
// Initialize defenders for current round
function setupRound() {
	// Clear existing defenders
	for (var i = 0; i < defenders.length; i++) {
		defenders[i].destroy();
	}
	defenders = [];
	// Add defenders based on round
	var numDefenders = Math.min(currentRound - 1, 4);
	for (var i = 0; i < numDefenders; i++) {
		var defender = game.addChild(new Defender());
		var spacing = 120;
		var startX = goalX - (numDefenders - 1) * spacing / 2;
		defender.x = startX + i * spacing;
		defender.y = goalY + 300 + currentRound * 50;
		defenders.push(defender);
	}
	roundText.setText('Round: ' + currentRound);
	attemptsText.setText('Attempts: ' + attemptsLeft);
}
// Create trajectory preview
function createTrajectoryPreview(power, angle) {
	// Clear existing dots
	for (var i = 0; i < trajectoryDots.length; i++) {
		trajectoryDots[i].destroy();
	}
	trajectoryDots = [];
	// Calculate trajectory points
	var steps = 15;
	var stepTime = 0.8;
	var tempVelX = Math.cos(angle) * power * 0.7;
	var tempVelY = Math.sin(angle) * power * 0.7;
	var tempX = ball.x;
	var tempY = ball.y;
	for (var i = 0; i < steps; i++) {
		tempX += tempVelX * stepTime;
		tempY += tempVelY * stepTime;
		// No gravity applied to trajectory preview
		tempVelX *= 0.98;
		tempVelY *= 0.98;
		if (tempY > 2732 || tempX < 0 || tempX > 2048) break;
		var dot = game.addChild(new TrajectoryDot());
		dot.x = tempX;
		dot.y = tempY;
		trajectoryDots.push(dot);
	}
}
// Clear trajectory preview
function clearTrajectoryPreview() {
	for (var i = 0; i < trajectoryDots.length; i++) {
		trajectoryDots[i].destroy();
	}
	trajectoryDots = [];
}
// Ball collision detection
function checkCollisions() {
	// Check goal scoring
	if (ball.x > goalX - 300 && ball.x < goalX + 300 && ball.y > goalY - 10 && ball.y < goalY + 200) {
		if (ball.y < goalY + 20) {
			// Goal scored!
			ball.isMoving = false;
			LK.getSound('goal').play();
			LK.effects.flashScreen(0x00ff00, 500);
			currentRound++;
			attemptsLeft = 3;
			LK.setTimeout(function () {
				ball.reset();
				setupRound();
			}, 1000);
			return;
		}
	}
	// Check goalkeeper collision
	if (ball.intersects(goalkeeper)) {
		ball.isMoving = false;
		LK.getSound('save').play();
		LK.effects.flashObject(goalkeeper, 0xffff00, 500);
		ballMissed();
		return;
	}
	// Check defender collisions
	for (var i = 0; i < defenders.length; i++) {
		if (ball.intersects(defenders[i])) {
			ball.isMoving = false;
			LK.effects.flashObject(defenders[i], 0xff0000, 500);
			ballMissed();
			return;
		}
	}
	// Check goal post collisions
	if (ball.intersects(leftPost) || ball.intersects(rightPost) || ball.intersects(crossbar)) {
		ball.isMoving = false;
		ballMissed();
		return;
	}
}
function ballMissed() {
	attemptsLeft--;
	attemptsText.setText('Attempts: ' + attemptsLeft);
	if (attemptsLeft <= 0) {
		LK.effects.flashScreen(0xff0000, 1000);
		LK.setTimeout(function () {
			attemptsLeft = 3;
			ball.reset();
			setupRound();
		}, 1500);
	} else {
		LK.setTimeout(function () {
			ball.reset();
		}, 1000);
	}
}
// Game controls
game.down = function (x, y, obj) {
	if (!ball.isMoving && ball.y > 2000) {
		isAiming = true;
		dragStartX = x;
		dragStartY = y;
	}
};
game.move = function (x, y, obj) {
	if (isAiming && !ball.isMoving) {
		var deltaX = x - dragStartX;
		var deltaY = y - dragStartY;
		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
		var power = Math.min(distance / 8, 25);
		var angle = Math.atan2(-deltaY, deltaX);
		powerText.x = ball.x;
		powerText.y = ball.y - 100;
		powerText.setText('Power: ' + Math.round(power));
		createTrajectoryPreview(power, angle);
	}
};
game.up = function (x, y, obj) {
	if (isAiming && !ball.isMoving) {
		var deltaX = x - dragStartX;
		var deltaY = y - dragStartY;
		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
		if (distance > 20) {
			var power = Math.min(distance / 8, 25);
			var angle = Math.atan2(-deltaY, deltaX);
			ball.shoot(power, angle);
		}
		isAiming = false;
		powerText.setText('');
		clearTrajectoryPreview();
	}
};
game.update = function () {
	if (ball.isMoving) {
		checkCollisions();
	}
};
// Initialize first round
setupRound();

===================================================================
--- original.js
+++ change.js
@@ -13,9 +13,9 @@
 		anchorY: 0.5
 	});
 	self.velocityX = 0;
 	self.velocityY = 0;
-	self.gravity = 0.5;
+	self.gravity = 0;
 	self.friction = 0.98;
 	self.isMoving = false;
 	self.shoot = function (power, angle) {
 		self.velocityX = Math.cos(angle) * power;
@@ -33,9 +33,9 @@
 	self.update = function () {
 		if (self.isMoving) {
 			self.x += self.velocityX;
 			self.y += self.velocityY;
-			self.velocityY += self.gravity;
+			// No gravity applied - ball travels in straight line
 			self.velocityX *= self.friction;
 			self.velocityY *= self.friction;
 			// Stop if moving too slowly
 			if (Math.abs(self.velocityX) < 0.1 && Math.abs(self.velocityY) < 0.1) {
@@ -186,9 +186,9 @@
 	var tempY = ball.y;
 	for (var i = 0; i < steps; i++) {
 		tempX += tempVelX * stepTime;
 		tempY += tempVelY * stepTime;
-		tempVelY += 0.5 * stepTime;
+		// No gravity applied to trajectory preview
 		tempVelX *= 0.98;
 		tempVelY *= 0.98;
 		if (tempY > 2732 || tempX < 0 || tempX > 2048) break;
 		var dot = game.addChild(new TrajectoryDot());