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

/**** 
* Classes
****/ 
// Box class
var Box = Container.expand(function () {
	var self = Container.call(this);
	var boxGraphics = self.attachAsset('box', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.2,
		// Increase the scale to enlarge the bounding box
		scaleY: 1.2
	});
	self.speed = 5;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
// Box1 class
var Box1 = Container.expand(function () {
	var self = Container.call(this);
	var boxGraphics = self.attachAsset('box1', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.2,
		// Increase the scale to enlarge the bounding box
		scaleY: 1.2
	});
	self.speed = 5;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
// Box2 class
var Box2 = Container.expand(function () {
	var self = Container.call(this);
	var boxGraphics = self.attachAsset('box2', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.2,
		// Increase the scale to enlarge the bounding box
		scaleY: 1.2
	});
	self.speed = 7;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
// Box3 class
var Box3 = Container.expand(function () {
	var self = Container.call(this);
	var boxGraphics = self.attachAsset('box3', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.2,
		// Increase the scale to enlarge the bounding box
		scaleY: 1.2
	});
	self.speed = 9;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
// The assets will be automatically created and loaded by the LK engine.
// Bubble class
var Bubble = Container.expand(function () {
	var self = Container.call(this);
	var bubbleGraphics = self.attachAsset('bubble', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 1 // Start fully visible instead of transparent
	});
	self.speed = 10;
	// Track last position for collision detection
	self.lastY = 0;
	self.lastIntersecting = false;
	self.update = function () {
		// Track last position before moving
		self.lastY = self.y;
		self.lastIntersecting = self.intersects(player);
		self.speed += 0.5; // Add gravity acceleration
		self.y += self.speed;
		self.x += self.speedX; // Update horizontal position based on speedX
		// Bounce off the left and right margins
		if (self.x <= 0 && self.speedX < 0 || self.x >= 2048 && self.speedX > 0) {
			self.speedX *= -1; // Reverse horizontal direction
		}
		// No tweening - just change tint directly when reaching threshold
		if (self.y > 1532) {
			bubbleGraphics.tint = 0xFF0000;
		}
		if (self.y > 2732 || !self.lastIntersecting && self.intersects(player)) {
			self.destroy();
			lives -= 1;
			// Remove a heart icon when a life is lost
			if (hearts.length > lives) {
				var heartToRemove = hearts.pop();
				if (heartToRemove) {
					tween(heartToRemove.scale, {
						x: 0,
						y: 0
					}, {
						duration: 1000,
						easing: tween.easeInOut,
						onFinish: function onFinish() {
							heartToRemove.destroy();
						}
					});
				}
			}
			if (lives < 0) {
				LK.showGameOver();
			}
		}
	};
});
// Explosion class
var Explosion = Container.expand(function () {
	var self = Container.call(this);
	var explosionGraphics = self.attachAsset('explosion', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	tween(explosionGraphics, {
		scaleX: explosionGraphics.scaleX + 1,
		scaleY: explosionGraphics.scaleY + 1
	}, {
		duration: 1000,
		easing: tween.bounceOut,
		onFinish: function onFinish() {
			self.destroy();
		}
	});
	self.update = function () {
		// The explosion will disappear after a while
		if (self.alpha > 0) {
			self.alpha -= 0.02;
		} else {
			self.destroy();
		}
	};
});
// Harpoon class
var Harpoon = Container.expand(function () {
	var self = Container.call(this);
	var harpoonGraphics = self.attachAsset('harpoon', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -20;
	self.trail = game.addChild(new Trail());
	self.update = function () {
		self.y += self.speed;
		self.trail.height = 2732 - self.y;
		self.trail.y = self.y + self.trail.height / 2;
		if (self.y < 0 || self.y < 2732 * (1 / 3)) {
			self.destroy();
			self.trail.destroy();
		}
	};
});
// Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = function () {
		if (self.direction && self.direction === 'left') {
			self.x -= self.speed;
		} else if (self.direction === 'right') {
			self.x += self.speed;
		}
	};
	self.shoot = function () {
		var harpoon = new Harpoon();
		harpoon.x = player.x;
		harpoon.y = player.y - 200;
		harpoon.trail.x = player.x;
		harpoon.trail.y = player.y - 200;
		game.addChild(harpoon);
		LK.getSound('crossbow').play();
	};
});
// PowerUpText class
var PowerUpText = Container.expand(function () {
	var self = Container.call(this);
	var textGraphics = self.attachAsset('PowerUpText', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		self.y -= 2;
		if (self.y < 0) {
			self.destroy();
		}
	};
});
// Trail class
var Trail = Container.expand(function () {
	var self = Container.call(this);
	var trailGraphics = self.attachAsset('line', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: 18
	});
	self.update = function () {
		self.y += 10;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0xFFFFFFFF // Init game with black background
});

/**** 
* Game Code
****/ 
var background = game.attachAsset('Landscape', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
});
game.setChildIndex(background, 0);
var player = new Player();
player.x = 2048 / 2;
player.y = 2732 - 180;
game.addChild(player); // Add player after trail to ensure correct rendering order
game.move = function (x, y, obj) {
	player.x = x;
	if (x < 2048 / 2 && player.scaleX > 0 || x >= 2048 / 2 && player.scaleX < 0) {
		player.scaleX *= -1; // Mirror the player image
	}
};
var score = 0;
var lives = 3;
var scoreBackground = new Container();
var scoreBgGraphics = scoreBackground.attachAsset('scoreBg', {
	anchorX: 0.5,
	anchorY: 0.1,
	scaleX: 5,
	scaleY: 5,
	alpha: 1
});
scoreBackground.addChild(scoreBgGraphics);
scoreBackground.x = 0;
scoreBackground.y = 0;
LK.gui.top.addChild(scoreBackground);
var scoreTxt = new Text2('Balloons popped: 0', {
	size: 30,
	fill: 0xFF3659,
	font: "'Comic Sans MS', cursive, sans-serif"
});
scoreTxt.anchor.set(0.5, -0.1);
scoreBackground.addChild(scoreTxt);
var hearts = [];
for (var i = 0; i < lives; i++) {
	var heart = LK.getAsset('heart', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -1 * (i + 1) * 50,
		// Position hearts with some spacing
		y: 50
	});
	LK.gui.topRight.addChild(heart);
	hearts.push(heart);
}
var lastShot = -999;
game.down = function (x, y, obj) {
	if (LK.ticks - lastShot > 30) {
		player.shoot();
		lastShot = LK.ticks;
	}
};
// Start the music 'chinese' upon starting the game
LK.playMusic('arcade');
game.update = function () {
	if (LK.ticks % 50 == 0) {
		var newBubble = new Bubble();
		newBubble.x = Math.random() * 2048;
		newBubble.y = 0;
		newBubble.speedX = Math.random() < 0.5 ? -5 : 5; // Randomly set initial horizontal speed
		// Initialize tracking properties for the bubble
		newBubble.lastY = newBubble.y;
		newBubble.lastIntersecting = false;
		game.addChild(newBubble);
		// No tweening for horizontal movement - bubbles now fall straight down
	}
	var bubbles = game.children.filter(function (child) {
		return child instanceof Bubble;
	});
	var harpoons = game.children.filter(function (child) {
		return child instanceof Harpoon;
	});
	for (var i = 0; i < bubbles.length; i++) {
		var bubble = bubbles[i];
		// Check for collision only if there wasn't one in the previous frame
		if (!bubble.lastIntersecting && bubble.intersects(player)) {
			bubble.destroy();
			lives -= 1;
			// Remove a heart icon when a life is lost
			if (hearts.length > lives) {
				var heartToRemove = hearts.pop();
				if (heartToRemove) {
					tween(heartToRemove.scale, {
						x: 0,
						y: 0
					}, {
						duration: 1000,
						easing: tween.easeInOut,
						onFinish: function onFinish() {
							heartToRemove.destroy();
						}
					});
				}
			}
			if (lives < 0) {
				LK.showGameOver();
			}
		}
		for (var j = 0; j < harpoons.length; j++) {
			var harpoon = harpoons[j];
			if (bubble.intersects(harpoon)) {
				bubble.destroy();
				LK.getSound('explosion').play();
				harpoon.trail.destroy(); // Destroy the harpoon trail
				harpoon.destroy();
				bubbles.splice(i, 1); // Remove bubble from the array
				score += 1;
				scoreTxt.setText("Balloons popped: " + score.toString());
				tween(scoreTxt.scale, {
					x: 2,
					y: 2
				}, {
					duration: 500,
					easing: tween.easeInOut,
					onFinish: function onFinish() {
						tween(scoreTxt.scale, {
							x: 1,
							y: 1
						}, {
							duration: 500,
							easing: tween.easeInOut
						});
					}
				});
				harpoons.splice(j, 1); // Remove harpoon from the array
				// Create an explosion at the intersection point
				var explosion = new Explosion();
				explosion.x = bubble.x;
				explosion.y = bubble.y;
				game.addChild(explosion);
				// Create a box at the intersection point with a 10% probability
				if (!game.children.some(function (child) {
					return child instanceof Box || child instanceof Box1 || child instanceof Box2 || child instanceof Box3;
				})) {
					if (Math.random() < 1) {
						var boxType = Math.floor(Math.random() * 4);
						var box;
						switch (boxType) {
							case 0:
								box = new Box();
								break;
							case 1:
								box = new Box1();
								break;
							case 2:
								box = new Box2();
								break;
							case 3:
								box = new Box3();
								break;
						}
						box.x = bubble.x;
						box.y = bubble.y;
						game.addChild(box);
					}
				}
			}
		}
		var boxes = game.children.filter(function (child) {
			return child instanceof Box || child instanceof Box1 || child instanceof Box2 || child instanceof Box3;
		});
		for (var k = 0; k < boxes.length; k++) {
			var box = boxes[k];
			for (var l = 0; l < harpoons.length; l++) {
				var harpoon = harpoons[l];
				if (box.intersects(harpoon)) {
					box.destroy();
					LK.getSound('powerup').play();
					harpoon.trail.destroy();
					harpoon.destroy();
					// Display toast text based on the type of box destroyed
					var toastText = new Text2('', {
						size: 250,
						fill: 0xFFC0CB,
						font: "'Comic Sans MS', cursive, sans-serif"
					});
					var toastTextBg = new Text2('', {
						size: 255,
						fill: 0xFF00AA,
						font: "'Comic Sans MS', cursive, sans-serif"
					});
					toastText.anchor.set(0.5, 0.5);
					toastText.x = 2048 / 2;
					toastText.y = 2732 / 2;
					toastTextBg.anchor.set(0.5, 0.5);
					toastTextBg.x = 2048 / 2;
					toastTextBg.y = 2732 / 2;
					game.addChild(toastText);
					game.addChild(toastTextBg);
					if (box instanceof Box1) {
						toastText.setText("Smash!");
						toastTextBg.setText("Smash!");
					} else if (box instanceof Box2) {
						toastText.setText("Destruction!");
						toastTextBg.setText("Destruction!");
					} else if (box instanceof Box) {
						toastText.setText("Less madness!");
						toastTextBg.setText("Less madness!");
					} else if (box instanceof Box3) {
						toastText.setText("Life up!");
						toastTextBg.setText("Life up!");
					}
					// Tween the toast text to fade out and destroy after 2 seconds
					tween(toastText, {
						alpha: 0
					}, {
						duration: 500,
						onFinish: function onFinish() {
							toastText.destroy();
						}
					});
					tween(toastTextBg, {
						alpha: 0
					}, {
						duration: 500,
						onFinish: function onFinish() {
							toastTextBg.destroy();
						}
					});
					boxes.splice(k, 1);
					harpoons.splice(l, 1);
					// Check if the destroyed box is an instance of Box1
					if (box instanceof Box1) {
						// Create six additional harpoons and trails
						for (var i = 1; i <= 3; i++) {
							var leftHarpoon = new Harpoon();
							leftHarpoon.x = player.x - i * 150;
							leftHarpoon.y = player.y;
							leftHarpoon.trail.x = player.x - i * 150;
							leftHarpoon.trail.y = player.y;
							game.addChild(leftHarpoon);
							var rightHarpoon = new Harpoon();
							rightHarpoon.x = player.x + i * 150;
							rightHarpoon.y = player.y;
							rightHarpoon.trail.x = player.x + i * 150;
							rightHarpoon.trail.y = player.y;
							game.addChild(rightHarpoon);
							// Set a timeout to remove the additional harpoons after 5 seconds
							LK.setTimeout(function (lh, rh) {
								lh.destroy();
								lh.trail.destroy();
								rh.destroy();
								rh.trail.destroy();
							}.bind(null, leftHarpoon, rightHarpoon), 5000);
						}
					}
					// Check if the destroyed box is an instance of Box and reduce bubble speed
					if (box instanceof Box) {
						var bubbles = game.children.filter(function (child) {
							return child instanceof Bubble;
						});
						bubbles.forEach(function (bubble) {
							bubble.speed /= 2;
						});
						LK.setTimeout(function () {
							bubbles.forEach(function (bubble) {
								bubble.speed *= 2;
							});
						}, 5000);
					}
					// Check if the destroyed box is an instance of Box3 and lives are less than 3
					if (box instanceof Box3 && lives < 3) {
						lives += 1;
						var heart = LK.getAsset('heart', {
							anchorX: 0.5,
							anchorY: 0.5,
							x: -1 * lives * 50,
							y: 50
						});
						LK.gui.topRight.addChild(heart);
						hearts.push(heart);
					}
					// Check if the destroyed box is an instance of Box2
					if (box instanceof Box2) {
						var bubbles = game.children.filter(function (child) {
							return child instanceof Bubble;
						});
						var bubblesDestroyed = bubbles.length;
						bubbles.forEach(function (bubble) {
							bubble.destroy();
						});
						score += bubblesDestroyed;
						scoreTxt.setText("Balloons popped: " + score.toString());
						tween(scoreTxt.scale, {
							x: 2,
							y: 2
						}, {
							duration: 500,
							easing: tween.easeInOut,
							onFinish: function onFinish() {
								tween(scoreTxt.scale, {
									x: 1,
									y: 1
								}, {
									duration: 500,
									easing: tween.easeInOut
								});
							}
						});
					}
					break;
				}
			}
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -94,8 +94,9 @@
 	self.update = function () {
 		// Track last position before moving
 		self.lastY = self.y;
 		self.lastIntersecting = self.intersects(player);
+		self.speed += 0.5; // Add gravity acceleration
 		self.y += self.speed;
 		self.x += self.speedX; // Update horizontal position based on speedX
 		// Bounce off the left and right margins
 		if (self.x <= 0 && self.speedX < 0 || self.x >= 2048 && self.speedX > 0) {