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

/**** 
* Classes
****/ 
var Car = Container.expand(function (carType) {
	var self = Container.call(this);
	var carBody = self.attachAsset(carType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 0;
	self.maxSpeed = 200;
	self.acceleration = 0;
	self.rpm = 1000;
	self.gear = 1;
	self.maxGear = 6;
	self.perfectShiftZone = {
		min: 6000,
		max: 6500
	};
	self.redline = 7000;
	self.isRevving = false;
	self.raceStarted = false;
	self.raceFinished = false;
	self.startRevving = function () {
		self.isRevving = true;
	};
	self.stopRevving = function () {
		self.isRevving = false;
	};
	self.shift = function () {
		if (self.gear < self.maxGear && self.raceStarted && !self.raceFinished) {
			var perfect = self.rpm >= self.perfectShiftZone.min && self.rpm <= self.perfectShiftZone.max;
			if (perfect) {
				self.gear++;
				self.rpm = 2000;
				self.acceleration = 0.8;
				LK.getSound('perfectShift').play();
				LK.effects.flashScreen(0x4CAF50, 200);
			} else {
				self.gear++;
				self.rpm = 2000;
				self.acceleration = 0.3;
				LK.getSound('badShift').play();
				LK.effects.flashScreen(0xF44336, 200);
			}
		}
	};
	self.update = function () {
		if (self.raceFinished) return;
		if (self.isRevving && !self.raceStarted) {
			self.rpm += 160;
			if (self.rpm > self.redline) {
				self.rpm = self.redline;
			}
		} else if (!self.isRevving && !self.raceStarted) {
			self.rpm -= 40;
			if (self.rpm < 1000) {
				self.rpm = 1000;
			}
		}
		if (self.raceStarted) {
			var rpmIncrease = 120 / self.gear; // RPM increases slower in higher gears
			self.rpm += rpmIncrease;
			if (self.rpm > self.redline) {
				self.rpm = self.redline;
				self.acceleration = 0.1;
			}
			// Calculate target speed based on RPM and gear
			var rpmRatio = (self.rpm - 1000) / (self.redline - 1000); // Normalize RPM to 0-1
			var gearMaxSpeed = self.maxSpeed * (self.gear / self.maxGear); // Max speed for current gear
			var targetSpeed = rpmRatio * gearMaxSpeed;
			// Rev limiter: when at redline, speed is capped at gear's max speed
			if (self.rpm >= self.redline) {
				targetSpeed = gearMaxSpeed;
			}
			// Gradually adjust speed towards target speed
			if (targetSpeed > self.speed) {
				self.speed += self.acceleration;
			} else {
				self.speed = targetSpeed;
			}
			if (self.speed > self.maxSpeed) {
				self.speed = self.maxSpeed;
			}
			self.x += self.speed * 0.15;
			self.acceleration *= 0.95;
		}
	};
	return self;
});
var OpponentCar = Car.expand(function () {
	var self = Car.call(this, 'opponentCar');
	self.aiShiftTimer = 0;
	self.aiShiftDelay = 90 + Math.random() * 30;
	self.difficultyLevel = 'easy'; // Will be updated based on current race
	self.baseLaunchAcceleration = 0.5; // Base launch performance
	self.baseShiftAcceleration = 0.4; // Base shift performance
	self.update = function () {
		// Call parent update manually since we're using expand()
		if (self.raceFinished) return;
		if (self.isRevving && !self.raceStarted) {
			self.rpm += 160;
			if (self.rpm > self.redline) {
				self.rpm = self.redline;
			}
		} else if (!self.isRevving && !self.raceStarted) {
			self.rpm -= 40;
			if (self.rpm < 1000) {
				self.rpm = 1000;
			}
		}
		if (self.raceStarted) {
			var rpmIncrease = 120 / self.gear; // RPM increases slower in higher gears
			self.rpm += rpmIncrease;
			if (self.rpm > self.redline) {
				self.rpm = self.redline;
				self.acceleration = 0.1;
			}
			// Calculate target speed based on RPM and gear
			var rpmRatio = (self.rpm - 1000) / (self.redline - 1000); // Normalize RPM to 0-1
			var gearMaxSpeed = self.maxSpeed * (self.gear / self.maxGear); // Max speed for current gear
			var targetSpeed = rpmRatio * gearMaxSpeed;
			// Rev limiter: when at redline, speed is capped at gear's max speed
			if (self.rpm >= self.redline) {
				targetSpeed = gearMaxSpeed;
			}
			// Gradually adjust speed towards target speed
			if (targetSpeed > self.speed) {
				self.speed += self.acceleration;
			} else {
				self.speed = targetSpeed;
			}
			if (self.speed > self.maxSpeed) {
				self.speed = self.maxSpeed;
			}
			self.x += self.speed * 0.15;
			self.acceleration *= 0.95;
		}
		if (self.raceStarted && !self.raceFinished) {
			self.aiShiftTimer++;
			// Difficulty-based shift timing and performance
			var shiftDelay, minAcceleration, maxAcceleration;
			if (self.difficultyLevel === 'easy') {
				shiftDelay = 100 + Math.random() * 60; // Slower shifts: 100-160 frames
				minAcceleration = 0.4;
				maxAcceleration = 0.6;
			} else if (self.difficultyLevel === 'medium') {
				shiftDelay = 80 + Math.random() * 40; // Medium shifts: 80-120 frames  
				minAcceleration = 0.6;
				maxAcceleration = 0.75;
			} else {
				// hard
				shiftDelay = 60 + Math.random() * 20; // Fast shifts: 60-80 frames
				minAcceleration = 0.75;
				maxAcceleration = 0.9;
			}
			if (self.aiShiftTimer >= self.aiShiftDelay && self.gear < self.maxGear) {
				// Opponent car shifts automatically with difficulty-based performance
				self.gear++;
				self.rpm = 2000;
				self.acceleration = minAcceleration + Math.random() * (maxAcceleration - minAcceleration);
				self.aiShiftTimer = 0;
				self.aiShiftDelay = shiftDelay;
			}
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB
});

/**** 
* Game Code
****/ 
var background = game.attachAsset('background', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 200
});
var currentRace = 1;
var maxRaces = 10;
var raceState = 'countdown';
var countdownTimer = 0;
var startLightTimer = 0;
var perfectStartWindow = false;
var lightSequenceStep = 0;
var lightSequenceTimer = 0;
var currentGearSound = null;
var revSound = null;
var lastGear = 1;
var isCurrentlyRevving = false;
var track = game.attachAsset('track', {
	anchorX: 0,
	anchorY: 0.5,
	x: 0,
	y: 1366
});
var startLine = game.attachAsset('startLine', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 100,
	y: 1366
});
var finishLine = game.attachAsset('finishLine', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1948,
	y: 1366
});
var playerCar = game.addChild(new Car('playerCar'));
playerCar.x = 50;
playerCar.y = 1320;
var opponentCar = game.addChild(new OpponentCar());
opponentCar.x = 50;
opponentCar.y = 1420;
var rpmGauge = game.attachAsset('rpmGauge', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 1600
});
var perfectZone = game.attachAsset('perfectZone', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1180,
	y: 1600
});
var rpmNeedle = game.attachAsset('rpmNeedle', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 824,
	y: 1600
});
var redLight1 = game.attachAsset('redLight1', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 924,
	y: 600,
	alpha: 0.3
});
var redLight2 = game.attachAsset('redLight2', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 974,
	y: 600,
	alpha: 0.3
});
var redLight3 = game.attachAsset('redLight3', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1074,
	y: 600,
	alpha: 0.3
});
var redLight4 = game.attachAsset('redLight4', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1124,
	y: 600,
	alpha: 0.3
});
var redLight = game.attachAsset('redLight', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 600
});
var greenLight = game.attachAsset('greenLight', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 600,
	alpha: 0
});
var speedText = new Text2('0 MPH', {
	size: 80,
	fill: 0xFFFFFF
});
speedText.anchor.set(0.5, 0);
speedText.x = 1024;
speedText.y = 1700;
game.addChild(speedText);
var gearText = new Text2('GEAR: 1', {
	size: 60,
	fill: 0xFFFFFF
});
gearText.anchor.set(0.5, 0);
gearText.x = 1024;
gearText.y = 1500;
game.addChild(gearText);
var raceText = new Text2('RACE ' + currentRace, {
	size: 100,
	fill: 0xFFFFFF
});
raceText.anchor.set(0.5, 0.5);
raceText.x = 1024;
raceText.y = 300;
game.addChild(raceText);
var instructionText = new Text2('HOLD TO REV - RELEASE ON GREEN', {
	size: 50,
	fill: 0xFFFFFF
});
instructionText.anchor.set(0.5, 0.5);
instructionText.x = 1024;
instructionText.y = 800;
game.addChild(instructionText);
function startCountdown() {
	raceState = 'countdown';
	countdownTimer = 0;
	startLightTimer = 0;
	lightSequenceStep = 0;
	lightSequenceTimer = 0;
	// Reset all lights to dim state
	redLight1.alpha = 0.3;
	redLight2.alpha = 0.3;
	redLight3.alpha = 0.3;
	redLight4.alpha = 0.3;
	redLight.alpha = 0;
	greenLight.alpha = 0;
	// Start light sequence after 1 second
	LK.setTimeout(function () {
		// Light 1 turns on
		tween(redLight1, {
			alpha: 1
		}, {
			duration: 200
		});
		LK.setTimeout(function () {
			// Light 2 turns on
			tween(redLight2, {
				alpha: 1
			}, {
				duration: 200
			});
			LK.setTimeout(function () {
				// Light 3 turns on
				tween(redLight3, {
					alpha: 1
				}, {
					duration: 200
				});
				LK.setTimeout(function () {
					// Light 4 turns on
					tween(redLight4, {
						alpha: 1
					}, {
						duration: 200
					});
					LK.setTimeout(function () {
						// All red lights turn off and green lights turn on
						tween(redLight1, {
							alpha: 0.3
						}, {
							duration: 100
						});
						tween(redLight2, {
							alpha: 0.3
						}, {
							duration: 100
						});
						tween(redLight3, {
							alpha: 0.3
						}, {
							duration: 100
						});
						tween(redLight4, {
							alpha: 0.3
						}, {
							duration: 100
						});
						tween(greenLight, {
							alpha: 1
						}, {
							duration: 200
						});
						perfectStartWindow = true;
						instructionText.setText('TAP TO SHIFT IN GREEN ZONE');
						LK.getSound('raceStart').play();
						LK.setTimeout(function () {
							raceState = 'racing';
							playerCar.raceStarted = true;
							opponentCar.raceStarted = true;
							var launchQuality = 0.5;
							if (playerCar.rpm >= 4000 && playerCar.rpm <= 5000) {
								launchQuality = 1.0;
							} else if (playerCar.rpm >= 3000 && playerCar.rpm <= 6000) {
								launchQuality = 0.8;
							}
							playerCar.acceleration = launchQuality;
							// Use difficulty-based launch acceleration with some randomness
							var launchVariation = Math.random() * 0.15; // ±0.15 variation
							opponentCar.acceleration = opponentCar.baseLaunchAcceleration + launchVariation;
							perfectStartWindow = false;
							// Reset RPM needle position to starting position
							playerCar.rpm = 1000;
							opponentCar.rpm = 1000;
						}, 500);
					}, 800);
				}, 800);
			}, 800);
		}, 800);
	}, 1000);
}
function updateOpponentDifficulty() {
	if (currentRace >= 1 && currentRace <= 3) {
		opponentCar.difficultyLevel = 'easy';
		opponentCar.baseLaunchAcceleration = 0.5;
		opponentCar.baseShiftAcceleration = 0.4;
	} else if (currentRace >= 4 && currentRace <= 6) {
		opponentCar.difficultyLevel = 'medium';
		opponentCar.baseLaunchAcceleration = 0.7;
		opponentCar.baseShiftAcceleration = 0.6;
	} else {
		// races 7-10
		opponentCar.difficultyLevel = 'hard';
		opponentCar.baseLaunchAcceleration = 0.85;
		opponentCar.baseShiftAcceleration = 0.75;
	}
}
function resetRace() {
	raceState = 'countdown';
	playerCar.x = 50;
	playerCar.y = 1320;
	playerCar.speed = 0;
	playerCar.rpm = 1000;
	playerCar.gear = 1;
	playerCar.acceleration = 0;
	playerCar.raceStarted = false;
	playerCar.raceFinished = false;
	playerCar.isRevving = false;
	opponentCar.x = 50;
	opponentCar.y = 1420;
	opponentCar.speed = 0;
	opponentCar.rpm = 1000;
	opponentCar.gear = 1;
	opponentCar.acceleration = 0;
	opponentCar.raceStarted = false;
	opponentCar.raceFinished = false;
	opponentCar.aiShiftTimer = 0;
	updateOpponentDifficulty(); // Update difficulty based on current race
	lightSequenceStep = 0;
	lightSequenceTimer = 0;
	// Reset all lights to dim state
	redLight1.alpha = 0.3;
	redLight2.alpha = 0.3;
	redLight3.alpha = 0.3;
	redLight4.alpha = 0.3;
	greenLight.alpha = 0;
	raceText.setText('RACE ' + currentRace);
	instructionText.setText('HOLD TO REV - RELEASE ON GREEN');
	// Stop any existing gear sound
	if (currentGearSound) {
		currentGearSound.stop();
		currentGearSound = null;
	}
	// Stop revving sound
	if (revSound) {
		revSound.stop();
		revSound = null;
	}
	isCurrentlyRevving = false;
	startCountdown();
}
game.down = function (x, y, obj) {
	if (raceState === 'countdown') {
		playerCar.startRevving();
		LK.getSound('engineRev').play();
	} else if (raceState === 'racing') {
		// Only player car shifting is controlled by player input
		playerCar.shift();
	}
};
game.up = function (x, y, obj) {
	if (raceState === 'countdown') {
		playerCar.stopRevving();
	}
};
game.update = function () {
	var needlePosition = 824 + (playerCar.rpm - 1000) / 6000 * 400;
	if (needlePosition > 1224) needlePosition = 1224;
	if (needlePosition < 824) needlePosition = 824;
	rpmNeedle.x = needlePosition;
	speedText.setText(Math.floor(playerCar.speed * 2) + ' MPH');
	gearText.setText('GEAR: ' + playerCar.gear);
	// Sound control - play individual gear sounds or revving sound
	if (playerCar.isRevving && !playerCar.raceStarted) {
		// Handle revving before race starts
		if (!isCurrentlyRevving) {
			// Stop any current gear sound
			if (currentGearSound) {
				currentGearSound.stop();
				currentGearSound = null;
			}
			// Start revving sound
			revSound = LK.getSound('revSound');
			revSound.play();
			isCurrentlyRevving = true;
		}
	} else if (playerCar.raceStarted) {
		// Handle gear sounds during racing
		if (isCurrentlyRevving) {
			// Stop revving sound
			if (revSound) {
				revSound.stop();
				revSound = null;
			}
			isCurrentlyRevving = false;
		}
		// Check if gear changed
		if (playerCar.gear !== lastGear) {
			// Stop current gear sound
			if (currentGearSound) {
				currentGearSound.stop();
				currentGearSound = null;
			}
			// Start new gear sound
			var gearSoundId = 'gear' + playerCar.gear + 'Sound';
			currentGearSound = LK.getSound(gearSoundId);
			currentGearSound.play();
			lastGear = playerCar.gear;
		}
	} else {
		// Stop all sounds when not racing or revving
		if (currentGearSound) {
			currentGearSound.stop();
			currentGearSound = null;
		}
		if (revSound) {
			revSound.stop();
			revSound = null;
		}
		isCurrentlyRevving = false;
	}
	if (raceState === 'racing') {
		if (playerCar.x >= 1900 && !playerCar.raceFinished) {
			playerCar.raceFinished = true;
			opponentCar.raceFinished = true;
			if (currentRace < maxRaces) {
				currentRace++;
				LK.setScore(currentRace - 1);
				LK.setTimeout(function () {
					resetRace();
				}, 2000);
			} else {
				LK.showYouWin();
			}
		} else if (opponentCar.x >= 1900 && !opponentCar.raceFinished) {
			playerCar.raceFinished = true;
			opponentCar.raceFinished = true;
			LK.showGameOver();
		}
	}
};
startCountdown();

===================================================================
--- original.js
+++ change.js
@@ -185,9 +185,9 @@
 var background = game.attachAsset('background', {
 	anchorX: 0,
 	anchorY: 0,
 	x: 0,
-	y: 0
+	y: 200
 });
 var currentRace = 1;
 var maxRaces = 10;
 var raceState = 'countdown';