/**** 
* Classes
****/
// Define the Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.createAsset('player', 'Player character', 0.5, 1);
	self.velocityY = 0;
	self.velocityX = 0;
	self.isOnGround = false;
	self.jump = function () {
		if (self.isOnGround) {
			self.velocityY = -15; // Jump force
			self.isOnGround = false;
		}
	};
	self.update = function () {
		if (!self.isOnGround) {
			self.x += self.velocityX;
			// Prevent player from going beyond the right side of the screen
			if (self.x > game.width - playerGraphics.width) {
				self.x = game.width - playerGraphics.width;
			}
			// Prevent player from going beyond the left side of the screen
			if (self.x < 0) {
				self.x = 0;
			}
			self.y += self.velocityY;
			// Prevent player from going above the top of the screen
			if (self.y < 0) {
				self.y = 0;
				self.velocityY = 0;
			}
			self.velocityY += 0.5; // Gravity
		}
		// Check for ground and set game over if player is at the bottom of the screen
		if (self.y > game.height - playerGraphics.height) {
			LK.showGameOver();
		}
	};
});
// Define the Platform class
var Platform = Container.expand(function () {
	var self = Container.call(this);
	var platformGraphics = self.createAsset('platform', 'Platform', 0.5, 1);
	self.speed = (Math.random() * 3 + 1) * 2; // Random speed between 2 and 8, doubled from original
	self.setInitialPosition = function (x, y) {
		self.x = x;
		self.y = y;
	};
});
// Define the MovingPlatform class
var MovingPlatform = Container.expand(function () {
	var self = Container.call(this);
	var movingPlatformGraphics = self.createAsset('moving_platform', 'Moving Platform', 0.5, 1);
	self.speed = (Math.random() * 2 + 1) * 2; // Random speed between 2 and 6
	self.direction = Math.random() > 0.5 ? 1 : -1; // Randomly choose initial direction
	self.setInitialPosition = function (x, y) {
		self.x = x;
		self.y = y;
	};
	self.update = function () {
		self.x += self.direction;
		// Change direction if it hits the edges of the screen
		if (self.x > game.width - movingPlatformGraphics.width || self.x < 0) {
			self.direction *= -1;
		}
	};
});

/**** 
* Initialize Game
****/
var game = new LK.Game({
	backgroundColor: 0x000000 // Init game with black background
});

/**** 
* Game Code
****/
// Initialize important asset arrays
var platforms = [];
var player;

// Create the player
player = game.addChild(new Player());
player.x = game.width / 2;
player.y = game.height / 2;

// Create initial platforms
var initialPlatformY = game.height - 300;
for (var i = 0; i < 7; i++) {
	var platform;
	if (Math.random() < 0.5) {
		// 50% chance to create a moving platform
		platform = new MovingPlatform();
	} else {
		platform = new Platform();
	}
	var randomX = Math.random() * (game.width - platform.width) + platform.width / 2;
	platform.setInitialPosition(randomX, initialPlatformY - i * 300);
	platforms.push(platform);
	game.addChild(platform);
}

// Event listener for touch events on the game area
game.on('down', function (obj) {
	var touchPosition = obj.event.getLocalPosition(game);
	if (touchPosition.x < game.width / 2) {
		player.velocityX = -10;
	} else {
		player.velocityX = 10;
	}
	player.jump();
});
game.on('up', function (obj) {
	player.velocityX = 0;
});

// Main game update loop
LK.on('tick', function () {
	player.update();

	// Update platforms
	for (var i = 0; i < platforms.length; i++) {
		var platform = platforms[i];
		platform.y += platform.speed; // Move platforms down at their own speed
		if (platform instanceof MovingPlatform) {
			platform.update(); // Update moving platforms
		}

		// Recycle platforms
		if (platform.y > game.height) {
			var randomX = Math.random() * (game.width - platform.width) + platform.width / 2;
			platform.x = randomX;
			platform.y = -50;
		}

		// Check for collision with player using the player's next position to predict collision
		var playerNextY = player.y + player.velocityY;
		if (player.intersects(platform) && player.velocityY > 0 && playerNextY + player.height > platform.y && player.y < platform.y) {
			player.isOnGround = true;
			player.velocityY = 0;
			player.y = platform.y - player.height;
		}
	}

	// Check for game over condition
	if (player.y < -player.height) {
		LK.showGameOver();
	}
});

===================================================================
--- original.js
+++ change.js
@@ -8,9 +8,9 @@
 	self.velocityY = 0;
 	self.velocityX = 0;
 	self.isOnGround = false;
 	self.jump = function () {
-		if (self.isOnGround && self.velocityY >= 0) {
+		if (self.isOnGround) {
 			self.velocityY = -15; // Jump force
 			self.isOnGround = false;
 		}
 	};