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

/**** 
* Classes
****/ 
// Bird class
var Bird = Container.expand(function () {
	var self = Container.call(this);
	self.speed = 0;
	self.dir = 1; // 1 = right, -1 = left
	self.isActive = true;
	var bird = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		if (!self.isActive) return;
		self.x += self.speed * self.dir;
	};
	self.crash = function () {
		if (!self.isActive) return;
		self.isActive = false;
		LK.getSound('bird_hit').play();
		tween(self, {
			alpha: 0
		}, {
			duration: 400,
			onFinish: function onFinish() {
				self.visible = false;
			}
		});
	};
	return self;
});
// Kite class
var Kite = Container.expand(function () {
	var self = Container.call(this);
	self.speed = 0;
	self.dir = 1;
	self.isActive = true;
	var kite = self.attachAsset('kite', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		if (!self.isActive) return;
		self.x += self.speed * self.dir;
	};
	self.crash = function () {
		if (!self.isActive) return;
		self.isActive = false;
		tween(self, {
			alpha: 0
		}, {
			duration: 400,
			onFinish: function onFinish() {
				self.visible = false;
			}
		});
	};
	return self;
});
// Paratrooper class
var Paratrooper = Container.expand(function () {
	var self = Container.call(this);
	// State: 0 = falling, 1 = parachute open, 2 = landed, 3 = crashed, 4 = rescued
	self.state = 0;
	self.speed = 0;
	self.hasParachute = false;
	self.isActive = true;
	// Attach body
	var body = self.attachAsset('paratrooper_body', {
		anchorX: 0.5,
		anchorY: 0.0
	});
	body.y = 0;
	// Attach parachute (hidden at first)
	var chute = self.attachAsset('parachute', {
		anchorX: 0.5,
		anchorY: 1.0,
		y: 0
	});
	chute.visible = false;
	// For tap detection
	self.down = function (x, y, obj) {
		if (self.state === 0 && self.isActive) {
			self.openParachute();
		}
	};
	// Open parachute
	self.openParachute = function () {
		if (self.state !== 0) return;
		self.state = 1;
		self.hasParachute = true;
		chute.visible = true;
		// Slow down
		self.speed = self.speed * 0.28;
		// Animate parachute pop
		chute.scaleY = 0.1;
		tween(chute, {
			scaleY: 1
		}, {
			duration: 200,
			easing: tween.bounceOut
		});
		LK.getSound('parachute_open').play();
	};
	// Crash animation
	self.crash = function () {
		if (!self.isActive) return;
		self.isActive = false;
		self.state = 3;
		// Flash red
		LK.effects.flashObject(self, 0xff0000, 600);
		LK.getSound('crash').play();
		// Fade out
		tween(self, {
			alpha: 0
		}, {
			duration: 600,
			onFinish: function onFinish() {
				self.visible = false;
			}
		});
	};
	// Rescue animation
	self.rescue = function () {
		if (!self.isActive) return;
		self.isActive = false;
		self.state = 4;
		// Flash green
		LK.effects.flashObject(self, 0x00ff00, 400);
		// Fade out
		tween(self, {
			alpha: 0
		}, {
			duration: 400,
			onFinish: function onFinish() {
				self.visible = false;
			}
		});
	};
	// Bird/kite collision
	self.hitHazard = function () {
		if (self.state === 0 && self.isActive) {
			self.crash();
		}
	};
	self.update = function () {
		if (!self.isActive) return;
		self.y += self.speed;
	};
	return self;
});
// Plane class (for visual, not interactive)
var Plane = Container.expand(function () {
	var self = Container.call(this);
	var plane = self.attachAsset('plane', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87ceeb // Sky blue
});

/**** 
* Game Code
****/ 
// Game constants
// Paratrooper body (box), parachute (ellipse), bird (ellipse), kite (box), ground (box), plane (box)
var GAME_WIDTH = 2048;
var GAME_HEIGHT = 2732;
var GROUND_HEIGHT = 60;
var LEVELS = 20;
// Level config: Each level increases paratroopers, speed, and hazards
var levelConfigs = [];
for (var i = 0; i < LEVELS; i++) {
	levelConfigs.push({
		paratroopers: 3 + Math.floor(i * 0.7),
		speed: 9 + i * 1.2,
		hazards: i < 3 ? 0 : Math.min(1 + Math.floor((i - 2) / 2), 4),
		hazardSpeed: 7 + i * 0.7,
		hazardTypes: i < 6 ? ['bird'] : i < 12 ? ['bird', 'kite'] : ['bird', 'kite'],
		spawnInterval: Math.max(40 - i * 2, 16)
	});
}
// State
var currentLevel = 1;
var bestLevel = storage.get('bestLevel') || 1;
var paratroopers = [];
var hazards = [];
var rescuedCount = 0;
var lostCount = 0;
var totalToRescue = 0;
var isLevelActive = false;
var plane = null;
var ground = null;
var levelText = null;
var rescuedText = null;
var lostText = null;
var bestLevelText = null;
var levelTimeout = null;
var spawnTick = 0;
var hazardTick = 0;
var dragNode = null;
// Add ground
ground = LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: GAME_HEIGHT - GROUND_HEIGHT
});
game.addChild(ground);
// Add level text
levelText = new Text2('Level 1', {
	size: 90,
	fill: 0xFFFFFF
});
levelText.anchor.set(0.5, 0);
LK.gui.top.addChild(levelText);
// Add rescued/lost text
rescuedText = new Text2('Rescued: 0', {
	size: 70,
	fill: 0xFFFFFF
});
rescuedText.anchor.set(0, 0);
LK.gui.top.addChild(rescuedText);
lostText = new Text2('Lost: 0', {
	size: 70,
	fill: 0xFF4444
});
lostText.anchor.set(1, 0);
LK.gui.topRight.addChild(lostText);
// Add best level text
bestLevelText = new Text2('Best: ' + bestLevel, {
	size: 60,
	fill: 0xFFFF00
});
bestLevelText.anchor.set(0.5, 0);
LK.gui.bottom.addChild(bestLevelText);
// Start music
LK.playMusic('bgmusic');
// Start first level
startLevel(currentLevel);
function startLevel(level) {
	// Update best level if needed
	if (level > bestLevel) {
		bestLevel = level;
		storage.set('bestLevel', bestLevel);
		if (bestLevelText) bestLevelText.setText('Best: ' + bestLevel);
	}
	// Reset state
	for (var i = 0; i < paratroopers.length; i++) {
		paratroopers[i].destroy();
	}
	for (var i = 0; i < hazards.length; i++) {
		hazards[i].destroy();
	}
	paratroopers = [];
	hazards = [];
	rescuedCount = 0;
	lostCount = 0;
	isLevelActive = true;
	spawnTick = 0;
	hazardTick = 0;
	totalToRescue = levelConfigs[level - 1].paratroopers;
	levelText.setText('Level ' + level);
	rescuedText.setText('Rescued: 0');
	lostText.setText('Lost: 0');
	// Animate level text
	levelText.alpha = 1;
	tween(levelText, {
		alpha: 0
	}, {
		duration: 1200
	});
	// Plane flyby
	if (plane) plane.destroy();
	plane = new Plane();
	plane.y = 180;
	plane.x = -200;
	game.addChild(plane);
	tween(plane, {
		x: GAME_WIDTH + 200
	}, {
		duration: 1800,
		easing: tween.linear,
		onFinish: function onFinish() {
			plane.destroy();
			plane = null;
		}
	});
}
// Paratrooper spawn
function spawnParatrooper() {
	var config = levelConfigs[currentLevel - 1];
	var p = new Paratrooper();
	// Random x, avoid edges
	var margin = 120;
	p.x = margin + Math.random() * (GAME_WIDTH - 2 * margin);
	p.y = 220;
	p.speed = config.speed + Math.random() * 2;
	p.state = 0;
	p.hasParachute = false;
	p.isActive = true;
	paratroopers.push(p);
	game.addChild(p);
}
// Hazard spawn
function spawnHazard() {
	var config = levelConfigs[currentLevel - 1];
	var type = config.hazardTypes[Math.floor(Math.random() * config.hazardTypes.length)];
	var h = null;
	var y = 400 + Math.random() * (GAME_HEIGHT - GROUND_HEIGHT - 800);
	var dir = Math.random() < 0.5 ? 1 : -1;
	var speed = config.hazardSpeed + Math.random() * 2;
	var x = dir === 1 ? -100 : GAME_WIDTH + 100;
	if (type === 'bird') {
		h = new Bird();
	} else {
		h = new Kite();
	}
	h.x = x;
	h.y = y;
	h.dir = dir;
	h.speed = speed;
	h.isActive = true;
	hazards.push(h);
	game.addChild(h);
}
// Game move handler (for drag, but not used in this game)
game.move = function (x, y, obj) {
	// No drag in this game
};
// Game down handler (for tap on paratroopers)
game.down = function (x, y, obj) {
	// Find topmost paratrooper under tap
	for (var i = paratroopers.length - 1; i >= 0; i--) {
		var p = paratroopers[i];
		if (p.isActive && p.state === 0 && p.visible) {
			// Check if tap is inside body
			var local = p.toLocal({
				x: x,
				y: y
			});
			var body = p.children[0];
			if (local.x >= body.x - body.width / 2 && local.x <= body.x + body.width / 2 && local.y >= body.y && local.y <= body.y + body.height) {
				p.openParachute();
				break;
			}
		}
	}
};
// Game update
game.update = function () {
	if (!isLevelActive) return;
	var config = levelConfigs[currentLevel - 1];
	// Spawn paratroopers
	if (paratroopers.length < totalToRescue && LK.ticks % config.spawnInterval === 0) {
		spawnParatrooper();
	}
	// Spawn hazards
	if (config.hazards > 0 && hazards.length < config.hazards && LK.ticks % (80 + Math.floor(Math.random() * 40)) === 0) {
		spawnHazard();
	}
	// Update paratroopers
	for (var i = paratroopers.length - 1; i >= 0; i--) {
		var p = paratroopers[i];
		p.update();
		// Check for ground collision
		if (p.isActive && p.y + 90 >= GAME_HEIGHT - GROUND_HEIGHT) {
			if (p.state === 1) {
				// Landed safely
				p.rescue();
				rescuedCount++;
				rescuedText.setText('Rescued: ' + rescuedCount);
			} else if (p.state === 0) {
				// Crashed
				p.crash();
				lostCount++;
				lostText.setText('Lost: ' + lostCount);
				// Flash screen
				LK.effects.flashScreen(0xff0000, 400);
			}
			// Remove after animation
			LK.setTimeout(function (paratrooper) {
				return function () {
					paratrooper.destroy();
				};
			}(p), 700);
			paratroopers.splice(i, 1);
			continue;
		}
		// Check for hazard collision
		for (var j = hazards.length - 1; j >= 0; j--) {
			var h = hazards[j];
			if (h.isActive && p.isActive && p.state === 0 && p.intersects(h)) {
				p.hitHazard();
				h.crash();
				lostCount++;
				lostText.setText('Lost: ' + lostCount);
				LK.effects.flashScreen(0xff0000, 400);
				LK.setTimeout(function (paratrooper) {
					return function () {
						paratrooper.destroy();
					};
				}(p), 700);
				paratroopers.splice(i, 1);
				break;
			}
		}
	}
	// Update hazards
	for (var i = hazards.length - 1; i >= 0; i--) {
		var h = hazards[i];
		h.update();
		// Remove if off screen
		if (h.dir === 1 && h.x > GAME_WIDTH + 120 || h.dir === -1 && h.x < -120) {
			h.destroy();
			hazards.splice(i, 1);
		}
	}
	// Level end condition
	if (rescuedCount + lostCount >= totalToRescue && paratroopers.length === 0) {
		isLevelActive = false;
		if (rescuedCount === totalToRescue) {
			// Level complete
			LK.getSound('levelup').play();
			if (currentLevel < LEVELS) {
				currentLevel++;
				LK.setTimeout(function () {
					startLevel(currentLevel);
				}, 1200);
			} else {
				// Game win
				LK.showYouWin();
			}
		} else {
			// Game over
			LK.showGameOver();
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -175,10 +175,10 @@
 
 /**** 
 * Game Code
 ****/ 
-// Paratrooper body (box), parachute (ellipse), bird (ellipse), kite (box), ground (box), plane (box)
 // Game constants
+// Paratrooper body (box), parachute (ellipse), bird (ellipse), kite (box), ground (box), plane (box)
 var GAME_WIDTH = 2048;
 var GAME_HEIGHT = 2732;
 var GROUND_HEIGHT = 60;
 var LEVELS = 20;
@@ -195,8 +195,9 @@
 	});
 }
 // State
 var currentLevel = 1;
+var bestLevel = storage.get('bestLevel') || 1;
 var paratroopers = [];
 var hazards = [];
 var rescuedCount = 0;
 var lostCount = 0;
@@ -206,8 +207,9 @@
 var ground = null;
 var levelText = null;
 var rescuedText = null;
 var lostText = null;
+var bestLevelText = null;
 var levelTimeout = null;
 var spawnTick = 0;
 var hazardTick = 0;
 var dragNode = null;
@@ -238,13 +240,26 @@
 	fill: 0xFF4444
 });
 lostText.anchor.set(1, 0);
 LK.gui.topRight.addChild(lostText);
+// Add best level text
+bestLevelText = new Text2('Best: ' + bestLevel, {
+	size: 60,
+	fill: 0xFFFF00
+});
+bestLevelText.anchor.set(0.5, 0);
+LK.gui.bottom.addChild(bestLevelText);
 // Start music
 LK.playMusic('bgmusic');
 // Start first level
 startLevel(currentLevel);
 function startLevel(level) {
+	// Update best level if needed
+	if (level > bestLevel) {
+		bestLevel = level;
+		storage.set('bestLevel', bestLevel);
+		if (bestLevelText) bestLevelText.setText('Best: ' + bestLevel);
+	}
 	// Reset state
 	for (var i = 0; i < paratroopers.length; i++) {
 		paratroopers[i].destroy();
 	}