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

/**** 
* Classes
****/ 
var BeatMarker = Container.expand(function () {
	var self = Container.call(this);
	var markerGraphics = self.attachAsset('beat_marker', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.intensity = 1.0;
	self.update = function () {
		self.y += self.speed;
		// Fade out as it moves
		markerGraphics.alpha = Math.max(0, 1 - self.y / 2732);
	};
	return self;
});
var Note = Container.expand(function () {
	var self = Container.call(this);
	var noteGraphics = self.attachAsset('note', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.collected = false;
	self.beatTime = 0;
	self.update = function () {
		self.y += self.speed;
		// Pulsing effect
		var pulse = 0.8 + Math.sin(LK.ticks * 0.2) * 0.2;
		noteGraphics.scaleX = pulse;
		noteGraphics.scaleY = pulse;
	};
	return self;
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.wasHit = false;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Ship = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('ship', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = shipSpeed;
	self.isAlive = true;
	self.update = function () {
		if (!self.isAlive) return;
		// Keep ship in bounds
		if (self.x < 100) self.x = 100;
		if (self.x > 1948) self.x = 1948;
	};
	return self;
});
var TunnelSegment = Container.expand(function () {
	var self = Container.call(this);
	var tunnelGraphics = self.attachAsset('tunnel', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x0a0a0a
});

/**** 
* Game Code
****/ 
// Game variables
var ship;
var tunnelSegments = [];
var obstacles = [];
var notes = [];
var beatMarkers = [];
var beatTimer = 0;
var beatInterval = 30; // frames between beats (60fps / 2 = 30 frames = 0.5 seconds)
var gameSpeed = 8;
var shipSpeed = 8; // Initial ship speed
var shipLane = 1; // 0 = left, 1 = center, 2 = right
var lanes = [512, 1024, 1536];
// UI Elements
var scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Initialize ship
ship = game.addChild(new Ship());
ship.x = lanes[shipLane];
ship.y = 2400;
// Create initial tunnel segments
function createTunnelSegment(y) {
	var segment = new TunnelSegment();
	segment.x = 1024;
	segment.y = y;
	segment.alpha = 0.3;
	return game.addChild(segment);
}
// Initialize tunnel
for (var i = 0; i < 30; i++) {
	tunnelSegments.push(createTunnelSegment(i * 100 - 500));
}
// Create obstacle
function createObstacle(lane, y) {
	var obstacle = new Obstacle();
	obstacle.x = lanes[lane];
	obstacle.y = y;
	obstacles.push(obstacle);
	return game.addChild(obstacle);
}
// Create note
function createNote(lane, y, beatTime) {
	var note = new Note();
	note.x = lanes[lane];
	note.y = y;
	note.beatTime = beatTime;
	notes.push(note);
	return game.addChild(note);
}
// Create beat marker
function createBeatMarker() {
	var marker = new BeatMarker();
	marker.x = 1024;
	marker.y = ship.y - 200;
	beatMarkers.push(marker);
	return game.addChild(marker);
}
// Handle input for lane switching
function handleInput(targetLane) {
	if (targetLane >= 0 && targetLane <= 2 && targetLane !== shipLane) {
		shipLane = targetLane;
		// Stop any existing tween on ship position
		tween.stop(ship, {
			x: true
		});
		// Smoothly tween to new lane position
		tween(ship, {
			x: lanes[shipLane]
		}, {
			duration: 200,
			easing: tween.easeOut
		});
	}
}
// Touch controls
game.down = function (x, y, obj) {
	// Divide screen into three lanes for touch control
	if (x < 683) {
		handleInput(0); // Left lane
	} else if (x < 1365) {
		handleInput(1); // Center lane
	} else {
		handleInput(2); // Right lane
	}
	// Check if touching on beat
	checkBeatTiming();
};
function checkBeatTiming() {
	var beatAccuracy = Math.abs(beatTimer % beatInterval - beatInterval / 2);
	var maxAccuracy = beatInterval * 0.3; // 30% tolerance
	if (beatAccuracy <= maxAccuracy) {
		// Good timing
		LK.setScore(LK.getScore() + 10);
		tween(ship, {
			scaleX: 1.2,
			scaleY: 1.2
		}, {
			duration: 100
		});
		tween(ship, {
			scaleX: 1.0,
			scaleY: 1.0
		}, {
			duration: 100
		});
	} else {
		// Bad timing
		LK.getSound('miss').play();
	}
	updateUI();
}
function updateUI() {
	scoreTxt.setText('Score: ' + LK.getScore());
}
// Spawn content based on beat
function spawnContent() {
	if (beatTimer % beatInterval === 0) {
		// Create beat marker
		createBeatMarker();
		// Randomly spawn obstacles and notes
		var spawnChance = Math.random();
		// Check if there's enough space before spawning obstacle
		var canSpawnObstacle = true;
		for (var i = 0; i < obstacles.length; i++) {
			if (obstacles[i].y < 300) {
				// Check if any obstacle is too close to top
				canSpawnObstacle = false;
				break;
			}
		}
		if (spawnChance < 0.15 && canSpawnObstacle) {
			// Reduced from 0.3 to 0.15
			// Spawn obstacle
			var obstacleLane = Math.floor(Math.random() * 3);
			createObstacle(obstacleLane, -100);
		}
		if (spawnChance > 0.6) {
			// Spawn note
			var noteLane = Math.floor(Math.random() * 3);
			createNote(noteLane, -100, LK.ticks + 300);
		}
	}
}
// Game update loop
game.update = function () {
	if (!ship.isAlive) return;
	beatTimer++;
	// Spawn new content
	spawnContent();
	// Manage tunnel segments
	for (var i = tunnelSegments.length - 1; i >= 0; i--) {
		var segment = tunnelSegments[i];
		if (segment.y > 2800) {
			segment.destroy();
			tunnelSegments.splice(i, 1);
			// Add new segment at the top
			tunnelSegments.push(createTunnelSegment(-200));
		}
	}
	// Check obstacle collisions
	for (var j = obstacles.length - 1; j >= 0; j--) {
		var obstacle = obstacles[j];
		if (obstacle.y > 2800) {
			obstacle.destroy();
			obstacles.splice(j, 1);
			continue;
		}
		if (!obstacle.wasHit && obstacle.intersects(ship)) {
			obstacle.wasHit = true;
			LK.effects.flashScreen(0xff4757, 500);
			LK.getSound('miss').play();
			// Reduce score
			LK.setScore(Math.max(0, LK.getScore() - 50));
			updateUI();
			// Check game over condition
			if (LK.getScore() <= -100) {
				ship.isAlive = false;
				LK.showGameOver();
			}
		}
	}
	// Check note collections
	for (var k = notes.length - 1; k >= 0; k--) {
		var note = notes[k];
		if (note.y > 2800) {
			note.destroy();
			notes.splice(k, 1);
			continue;
		}
		if (!note.collected && note.intersects(ship)) {
			note.collected = true;
			// Check timing accuracy
			var timingAccuracy = Math.abs(beatTimer % beatInterval - beatInterval / 2);
			var maxAccuracy = beatInterval * 0.4;
			if (timingAccuracy <= maxAccuracy) {
				// Perfect timing
				LK.setScore(LK.getScore() + 20);
				LK.getSound('notamusical').play();
				// Increase ship speed
				shipSpeed += 0.1;
				ship.speed = shipSpeed;
				// Visual feedback
				tween(note, {
					scaleX: 2,
					scaleY: 2,
					alpha: 0
				}, {
					duration: 200
				});
			} else {
				// Poor timing
				LK.setScore(LK.getScore() + 5);
			}
			note.destroy();
			notes.splice(k, 1);
			updateUI();
		}
	}
	// Clean up beat markers
	for (var l = beatMarkers.length - 1; l >= 0; l--) {
		var marker = beatMarkers[l];
		if (marker.y > 2800 || marker.alpha <= 0) {
			marker.destroy();
			beatMarkers.splice(l, 1);
		}
	}
	// Increase difficulty over time
	if (LK.ticks % 1800 === 0) {
		// Every 30 seconds
		gameSpeed += 0.5;
		beatInterval = Math.max(20, beatInterval - 1);
		// Update speeds for all moving objects
		for (var m = 0; m < tunnelSegments.length; m++) {
			tunnelSegments[m].speed = gameSpeed;
		}
		for (var n = 0; n < obstacles.length; n++) {
			obstacles[n].speed = gameSpeed;
		}
		for (var o = 0; o < notes.length; o++) {
			notes[o].speed = gameSpeed;
		}
		for (var p = 0; p < beatMarkers.length; p++) {
			beatMarkers[p].speed = gameSpeed;
		}
	}
	// Tunnel pulsing effect based on beat
	var beatPulse = Math.sin(beatTimer % beatInterval / beatInterval * Math.PI * 2);
	for (var q = 0; q < tunnelSegments.length; q++) {
		tunnelSegments[q].alpha = 0.2 + Math.abs(beatPulse) * 0.3;
	}
	// Victory condition
	if (LK.getScore() >= 10000) {
		LK.showYouWin();
	}
};
// Start background music
LK.playMusic('background');

===================================================================
--- original.js
+++ change.js
@@ -58,15 +58,11 @@
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
 	self.speed = shipSpeed;
-	self.targetX = 1024;
 	self.isAlive = true;
 	self.update = function () {
 		if (!self.isAlive) return;
-		// Smooth movement towards target
-		var diff = self.targetX - self.x;
-		self.x += diff * 0.15;
 		// Keep ship in bounds
 		if (self.x < 100) self.x = 100;
 		if (self.x > 1948) self.x = 1948;
 	};
@@ -156,11 +152,21 @@
 	return game.addChild(marker);
 }
 // Handle input for lane switching
 function handleInput(targetLane) {
-	if (targetLane >= 0 && targetLane <= 2) {
+	if (targetLane >= 0 && targetLane <= 2 && targetLane !== shipLane) {
 		shipLane = targetLane;
-		ship.targetX = lanes[shipLane];
+		// Stop any existing tween on ship position
+		tween.stop(ship, {
+			x: true
+		});
+		// Smoothly tween to new lane position
+		tween(ship, {
+			x: lanes[shipLane]
+		}, {
+			duration: 200,
+			easing: tween.easeOut
+		});
 	}
 }
 // Touch controls
 game.down = function (x, y, obj) {