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

/**** 
* Classes
****/ 
// Define a class for scrolling backgrounds
var Background = Container.expand(function () {
	var self = Container.call(this);
	self.speed = 3;
	self.asset = null;
	self.init = function (assetName, startX) {
		self.asset = self.attachAsset(assetName, {
			anchorX: 0,
			anchorY: 0
		});
		self.x = startX;
		self.y = 0;
	};
	self.update = function () {
		self.x -= gameSpeed;
		// If background has moved completely off screen to the left, reposition it to the right
		if (self.x <= -1366) {
			self.x = 1366 * 2;
		}
	};
	return self;
});
// Define a class for enemies
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.5,
		scaleY: 1.5
	});
	self.hit = false; // Flag to track if this enemy has already hit the player
	self.passed = false; // Flag to track if player has passed this enemy
	self.lastX = 0; // Track last X position for collision detection
	self.lastIntersecting = false; // Track last intersection state
	// Create a proper hitbox for collision detection
	self.hitbox = new Container();
	self.addChild(self.hitbox);
	// Set the hitbox size based on enemy graphics (smaller than visual for better gameplay)
	var hitboxWidth = enemyGraphics.width * 0.5;
	var hitboxHeight = enemyGraphics.height * 0.5;
	self.hitbox.width = hitboxWidth;
	self.hitbox.height = hitboxHeight;
	// Center the hitbox on the enemy
	self.hitbox.x = -hitboxWidth / 2;
	self.hitbox.y = -hitboxHeight / 2;
	// Initialize enemy position and properties
	self.init = function (x, y, type) {
		self.x = x;
		self.y = y;
		self.lastX = x;
		// Different enemy types can be implemented here
		if (type === "fast") {
			self.speed = gameSpeed * 1.2;
			enemyGraphics.tint = 0xFF0000; // Red for faster enemies
		} else if (type === "slow") {
			self.speed = gameSpeed * 0.8;
			enemyGraphics.tint = 0x00FF00; // Green for slower enemies
		} else {
			self.speed = gameSpeed;
		}
		return self;
	};
	self.update = function () {
		// Save last position for transition detection
		self.lastX = self.x;
		// Move enemy based on game speed
		self.x -= gameSpeed;
		// Remove enemy when it goes off screen
		if (self.x < -150) {
			self.destroy();
		}
	};
	return self;
});
// Define a class for special red enemies that move faster and are worth more points
var RedEnemy = Enemy.expand(function () {
	var self = Enemy.call(this);
	// Override the init method to customize the red enemy
	var parentInit = self.init;
	self.init = function (x, y) {
		// Call parent init with custom type
		parentInit.call(self, x, y, "fast");
		// Additional custom properties for red enemies
		self.pointValue = 2; // Worth more points
		// Make the enemy bob up and down for added challenge
		self.baseY = y;
		self.amplitude = 50; // Vertical movement range
		self.frequency = 0.05; // Speed of oscillation
		self.time = Math.random() * 100; // Random starting phase
		return self;
	};
	// Override the update method to add vertical movement
	var parentUpdate = self.update;
	self.update = function () {
		// Call parent update to handle horizontal movement
		parentUpdate.call(self);
		// Add vertical bobbing motion
		self.time += 1;
		self.y = self.baseY + Math.sin(self.time * self.frequency) * self.amplitude;
	};
	return self;
});
// Define a class for special green enemies that are slower but harder to jump over
var GreenEnemy = Enemy.expand(function () {
	var self = Enemy.call(this);
	// Override the init method to customize the green enemy
	var parentInit = self.init;
	self.init = function (x, y) {
		// Call parent init with custom type
		parentInit.call(self, x, y, "slow");
		// Additional custom properties for green enemies
		self.taller = true; // Taller hit box
		// Make the hitbox taller for green enemies
		if (self.hitbox) {
			self.hitbox.height *= 1.5;
			self.hitbox.y = -self.hitbox.height / 2;
		}
		return self;
	};
	return self;
});
//<Assets used in the game will automatically appear here>
// Define a class for the player character
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.5,
		scaleY: 1.5
	});
	self.speed = 5;
	self.jumpHeight = 40;
	self.isJumping = false;
	self.velocityY = 0;
	self.lives = 3; // Initialize player with 3 lives
	self.hearts = []; // Array to store heart icons
	self.createHearts = function () {
		// Create three hearts above player's head
		for (var i = 0; i < self.lives; i++) {
			var heart = new Container();
			// Create a red heart shape using a circle
			var heartShape = heart.attachAsset('enemy', {
				anchorX: 0.5,
				anchorY: 0.5,
				scaleX: 0.3,
				scaleY: 0.3,
				tint: 0xFF0000 // Red color for hearts
			});
			heart.x = (i - 1) * 50; // Position hearts horizontally (-50, 0, 50)
			heart.y = -150; // Position hearts higher above player's head
			self.hearts.push(heart);
			self.addChild(heart);
		}
	};
	// Initialize hearts when player is created
	self.createHearts();
	self.update = function () {
		if (self.isJumping) {
			self.y += self.velocityY;
			self.velocityY += 0.7; // Decreased gravity effect by 30%
			if (self.y >= 2732 * 0.55 + 400) {
				// Ground level at 55% of screen height (45% from bottom) + 400px down
				self.y = 2732 * 0.55 + 400;
				self.isJumping = false;
				self.velocityY = 0;
			}
		}
	};
	self.jump = function () {
		if (!self.isJumping) {
			self.isJumping = true;
			self.velocityY = -self.jumpHeight;
		}
	};
});
// Define a class for street backgrounds (bottom part)
var StreetBackground = Container.expand(function () {
	var self = Container.call(this);
	self.speed = 3;
	self.asset = null;
	self.init = function (assetName, startX) {
		self.asset = self.attachAsset(assetName, {
			anchorX: 0,
			anchorY: 0,
			scaleY: 0.5 // Make the background half height
		});
		self.x = startX;
		self.y = 2732 * 0.5; // Position in the bottom half of the screen
	};
	self.update = function () {
		self.x -= gameSpeed;
		// If background has moved completely off screen to the left, reposition it to the right
		if (self.x <= -2048) {
			self.x = 2048 * 2 - gameSpeed;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1A0933 // Dark purple background
});

/**** 
* Game Code
****/ 
// Game speed control variable
var gameSpeed = 5;
// Create three scrolling backgrounds for the top part
var backgrounds = [];
// Create three scrolling backgrounds for the bottom part (street)
var streetBackgrounds = [];
// Create each background and position them
for (var i = 0; i < 3; i++) {
	var bg = new Background();
	bg.init('background' + (i + 1), i * 1366);
	backgrounds.push(bg);
	game.addChild(bg);
	// Create street backgrounds using different assets
	var streetBg = new StreetBackground();
	streetBg.init('street' + (i + 1), i * 2048);
	streetBackgrounds.push(streetBg);
	game.addChild(streetBg);
}
// Initialize player
var player = game.addChild(new Player());
player.x = 2048 / 2 - 500; // Move player back 500 pixels
player.y = 2732 * 0.55 + 400; // Position player at 45% from bottom of screen + 400px down
// Initialize enemies
var enemies = [];
var enemySpawnInterval = 100;
var enemySpawnCounter = 0;
// Create a new Text2 object to display the score with cyberpunk styling
var scoreText = new Text2('Score: 0', {
	size: 80,
	fill: 0x00FFFF,
	// Cyan color for cyberpunk neon effect
	stroke: 0xFF00FF,
	// Magenta stroke for contrast
	strokeThickness: 5,
	// Thick stroke for glow effect
	dropShadow: true,
	dropShadowColor: 0x00FFFF,
	// Cyan shadow
	dropShadowBlur: 10,
	dropShadowAngle: Math.PI / 4,
	dropShadowDistance: 6,
	letterSpacing: 3 // Spacing between letters for futuristic look
});
// Add the score text to the game GUI at the top right of the screen
LK.gui.topRight.addChild(scoreText);
// Anchor the text to the right side
scoreText.anchor.set(1, 0);
// Add padding from the right edge
scoreText.x = -20;
scoreText.y = 20;
// Create a pulsating glow effect for the cyberpunk score display
function pulseScoreText() {
	tween(scoreText, {
		strokeThickness: 8,
		dropShadowBlur: 15
	}, {
		duration: 800,
		onFinish: function onFinish() {
			tween(scoreText, {
				strokeThickness: 5,
				dropShadowBlur: 10
			}, {
				duration: 800,
				onFinish: pulseScoreText
			});
		}
	});
}
pulseScoreText();
// Handle game updates
game.update = function () {
	// Increase game speed as score increases for difficulty progression
	gameSpeed = 5 + Math.min(LK.getScore() / 10, 5); // Cap at max 10 speed
	// Update scrolling backgrounds
	for (var i = 0; i < backgrounds.length; i++) {
		backgrounds[i].update();
	}
	// Update street backgrounds
	for (var i = 0; i < streetBackgrounds.length; i++) {
		streetBackgrounds[i].update();
	}
	player.update();
	// Spawn enemies
	enemySpawnCounter++;
	if (enemySpawnCounter >= enemySpawnInterval) {
		var enemy;
		var randomValue = Math.random();
		// Create different enemy types based on probability
		if (randomValue < 0.2) {
			// 20% chance for red fast enemies
			enemy = new RedEnemy();
			enemy.init(2048, 2732 * 0.55 + 400);
		} else if (randomValue < 0.4) {
			// 20% chance for green tall enemies
			enemy = new GreenEnemy();
			enemy.init(2048, 2732 * 0.55 + 400);
		} else {
			// 60% chance for normal enemies
			enemy = new Enemy();
			enemy.init(2048, 2732 * 0.55 + 400, "normal");
		}
		enemies.push(enemy);
		game.addChild(enemy);
		// Randomize the spawn interval for the next enemy
		enemySpawnInterval = Math.floor(Math.random() * 150) + 50;
		enemySpawnCounter = 0;
	}
	// Update enemies
	for (var j = enemies.length - 1; j >= 0; j--) {
		var currentEnemy = enemies[j];
		// Update enemy position and properties
		currentEnemy.update();
		// Track transition from not intersecting to intersecting for collision detection
		var currentIntersecting = player.intersects(currentEnemy.hitbox);
		// Only trigger collision on the first frame of intersection
		if (!currentEnemy.lastIntersecting && currentIntersecting && !currentEnemy.hit) {
			// Mark this enemy as already hit the player to prevent multiple hits
			currentEnemy.hit = true;
			// Decrease player lives
			player.lives--;
			// Flash screen red to indicate damage
			LK.effects.flashScreen(0xff0000, 500);
			// Remove a heart from display
			if (player.hearts.length > 0 && player.lives >= 0) {
				var heart = player.hearts[player.lives];
				if (heart) {
					// Animate heart disappearing
					tween(heart, {
						alpha: 0,
						scaleX: 0.1,
						scaleY: 0.1
					}, {
						duration: 300
					});
				}
			}
			// Check if player has no more lives
			if (player.lives <= 0) {
				LK.showGameOver();
			}
		}
		// Player passes an enemy (crossing from left of enemy to right of enemy)
		else if (player.x > currentEnemy.x && player.x <= currentEnemy.lastX && !currentEnemy.passed) {
			currentEnemy.passed = true;
			// Different enemy types give different points
			var pointsToAdd = currentEnemy.pointValue || 1;
			LK.setScore(LK.getScore() + pointsToAdd);
			// Update score with cyberpunk animation effect
			scoreText.setText('Score: ' + LK.getScore());
			// Flash the score text with brighter color when points are earned
			// Use different colors based on point value
			if (pointsToAdd > 1) {
				scoreText.tint = 0xFF0000; // Red for higher value enemies
			} else {
				scoreText.tint = 0xFFFFFF; // White for normal enemies
			}
			tween(scoreText, {
				scaleX: 1.2,
				scaleY: 1.2
			}, {
				duration: 300,
				onFinish: function onFinish() {
					tween(scoreText, {
						scaleX: 1,
						scaleY: 1,
						tint: 0x00FFFF
					}, {
						duration: 300
					});
				}
			});
		}
		// Update enemy's last intersection state
		currentEnemy.lastIntersecting = currentIntersecting;
	}
};
// Handle player jump
game.down = function (x, y, obj) {
	player.jump();
};

===================================================================
--- original.js
+++ change.js
@@ -37,26 +37,98 @@
 		scaleX: 1.5,
 		scaleY: 1.5
 	});
 	self.hit = false; // Flag to track if this enemy has already hit the player
-	// Create a smaller hitbox for collision detection
+	self.passed = false; // Flag to track if player has passed this enemy
+	self.lastX = 0; // Track last X position for collision detection
+	self.lastIntersecting = false; // Track last intersection state
+	// Create a proper hitbox for collision detection
 	self.hitbox = new Container();
 	self.addChild(self.hitbox);
-	// Set the hitbox size based on enemy graphics
-	self.hitbox.width = enemyGraphics.width * 0.6; // 60% of the enemy width
-	self.hitbox.height = enemyGraphics.height * 0.6; // 60% of the enemy height
+	// Set the hitbox size based on enemy graphics (smaller than visual for better gameplay)
+	var hitboxWidth = enemyGraphics.width * 0.5;
+	var hitboxHeight = enemyGraphics.height * 0.5;
+	self.hitbox.width = hitboxWidth;
+	self.hitbox.height = hitboxHeight;
 	// Center the hitbox on the enemy
-	self.hitbox.x = -self.hitbox.width / 2;
-	self.hitbox.y = -self.hitbox.height / 2;
-	self.passed = false; // Flag to track if player has passed this enemy
-	self.speed = 5;
+	self.hitbox.x = -hitboxWidth / 2;
+	self.hitbox.y = -hitboxHeight / 2;
+	// Initialize enemy position and properties
+	self.init = function (x, y, type) {
+		self.x = x;
+		self.y = y;
+		self.lastX = x;
+		// Different enemy types can be implemented here
+		if (type === "fast") {
+			self.speed = gameSpeed * 1.2;
+			enemyGraphics.tint = 0xFF0000; // Red for faster enemies
+		} else if (type === "slow") {
+			self.speed = gameSpeed * 0.8;
+			enemyGraphics.tint = 0x00FF00; // Green for slower enemies
+		} else {
+			self.speed = gameSpeed;
+		}
+		return self;
+	};
 	self.update = function () {
+		// Save last position for transition detection
+		self.lastX = self.x;
+		// Move enemy based on game speed
 		self.x -= gameSpeed;
-		if (self.x < -50) {
+		// Remove enemy when it goes off screen
+		if (self.x < -150) {
 			self.destroy();
 		}
 	};
+	return self;
 });
+// Define a class for special red enemies that move faster and are worth more points
+var RedEnemy = Enemy.expand(function () {
+	var self = Enemy.call(this);
+	// Override the init method to customize the red enemy
+	var parentInit = self.init;
+	self.init = function (x, y) {
+		// Call parent init with custom type
+		parentInit.call(self, x, y, "fast");
+		// Additional custom properties for red enemies
+		self.pointValue = 2; // Worth more points
+		// Make the enemy bob up and down for added challenge
+		self.baseY = y;
+		self.amplitude = 50; // Vertical movement range
+		self.frequency = 0.05; // Speed of oscillation
+		self.time = Math.random() * 100; // Random starting phase
+		return self;
+	};
+	// Override the update method to add vertical movement
+	var parentUpdate = self.update;
+	self.update = function () {
+		// Call parent update to handle horizontal movement
+		parentUpdate.call(self);
+		// Add vertical bobbing motion
+		self.time += 1;
+		self.y = self.baseY + Math.sin(self.time * self.frequency) * self.amplitude;
+	};
+	return self;
+});
+// Define a class for special green enemies that are slower but harder to jump over
+var GreenEnemy = Enemy.expand(function () {
+	var self = Enemy.call(this);
+	// Override the init method to customize the green enemy
+	var parentInit = self.init;
+	self.init = function (x, y) {
+		// Call parent init with custom type
+		parentInit.call(self, x, y, "slow");
+		// Additional custom properties for green enemies
+		self.taller = true; // Taller hit box
+		// Make the hitbox taller for green enemies
+		if (self.hitbox) {
+			self.hitbox.height *= 1.5;
+			self.hitbox.y = -self.hitbox.height / 2;
+		}
+		return self;
+	};
+	return self;
+});
 //<Assets used in the game will automatically appear here>
 // Define a class for the player character
 var Player = Container.expand(function () {
 	var self = Container.call(this);
@@ -229,23 +301,41 @@
 	player.update();
 	// Spawn enemies
 	enemySpawnCounter++;
 	if (enemySpawnCounter >= enemySpawnInterval) {
-		var enemy = new Enemy();
-		enemy.x = 2048;
-		enemy.y = 2732 * 0.55 + 400; // Spawn enemies at 45% from bottom of screen + 400px down
+		var enemy;
+		var randomValue = Math.random();
+		// Create different enemy types based on probability
+		if (randomValue < 0.2) {
+			// 20% chance for red fast enemies
+			enemy = new RedEnemy();
+			enemy.init(2048, 2732 * 0.55 + 400);
+		} else if (randomValue < 0.4) {
+			// 20% chance for green tall enemies
+			enemy = new GreenEnemy();
+			enemy.init(2048, 2732 * 0.55 + 400);
+		} else {
+			// 60% chance for normal enemies
+			enemy = new Enemy();
+			enemy.init(2048, 2732 * 0.55 + 400, "normal");
+		}
 		enemies.push(enemy);
 		game.addChild(enemy);
 		// Randomize the spawn interval for the next enemy
 		enemySpawnInterval = Math.floor(Math.random() * 150) + 50;
 		enemySpawnCounter = 0;
 	}
 	// Update enemies
 	for (var j = enemies.length - 1; j >= 0; j--) {
-		enemies[j].update();
-		if (player.intersects(enemies[j].hitbox) && !enemies[j].hit) {
+		var currentEnemy = enemies[j];
+		// Update enemy position and properties
+		currentEnemy.update();
+		// Track transition from not intersecting to intersecting for collision detection
+		var currentIntersecting = player.intersects(currentEnemy.hitbox);
+		// Only trigger collision on the first frame of intersection
+		if (!currentEnemy.lastIntersecting && currentIntersecting && !currentEnemy.hit) {
 			// Mark this enemy as already hit the player to prevent multiple hits
-			enemies[j].hit = true;
+			currentEnemy.hit = true;
 			// Decrease player lives
 			player.lives--;
 			// Flash screen red to indicate damage
 			LK.effects.flashScreen(0xff0000, 500);
@@ -266,15 +356,24 @@
 			// Check if player has no more lives
 			if (player.lives <= 0) {
 				LK.showGameOver();
 			}
-		} else if (player.x > enemies[j].x && !enemies[j].passed) {
-			enemies[j].passed = true;
-			LK.setScore(LK.getScore() + 1);
+		}
+		// Player passes an enemy (crossing from left of enemy to right of enemy)
+		else if (player.x > currentEnemy.x && player.x <= currentEnemy.lastX && !currentEnemy.passed) {
+			currentEnemy.passed = true;
+			// Different enemy types give different points
+			var pointsToAdd = currentEnemy.pointValue || 1;
+			LK.setScore(LK.getScore() + pointsToAdd);
 			// Update score with cyberpunk animation effect
 			scoreText.setText('Score: ' + LK.getScore());
 			// Flash the score text with brighter color when points are earned
-			scoreText.tint = 0xFFFFFF;
+			// Use different colors based on point value
+			if (pointsToAdd > 1) {
+				scoreText.tint = 0xFF0000; // Red for higher value enemies
+			} else {
+				scoreText.tint = 0xFFFFFF; // White for normal enemies
+			}
 			tween(scoreText, {
 				scaleX: 1.2,
 				scaleY: 1.2
 			}, {
@@ -289,8 +388,10 @@
 					});
 				}
 			});
 		}
+		// Update enemy's last intersection state
+		currentEnemy.lastIntersecting = currentIntersecting;
 	}
 };
 // Handle player jump
 game.down = function (x, y, obj) {