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

/**** 
* Classes
****/ 
var ButtonBot = Container.expand(function () {
	var self = Container.call(this);
	var buttonBotGraphics = self.attachAsset('BUTTON_BOT', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add down event to set landing duration to 100 during jump or double jump
	self.down = function (x, y, obj) {
		if (!player.inAir && !player.doubleJump) {
			player.rotation -= Math.PI / 2.25; // Rotate 80 degrees counter-clockwise
		} else if (player.inAir || player.doubleJump) {
			tween(player, {
				y: 2732 / 2 - 250
			}, {
				duration: 100,
				onFinish: function onFinish() {
					player.inAir = false;
					player.doubleJump = false;
					player.y = 2732 / 2 - 250;
				}
			});
		}
		if (player.inAir || player.doubleJump) {
			player.rotation -= Math.PI / 2.25; // Rotate 80 degrees counter-clockwise
			tween(player, {
				y: 2732 / 2 - 250
			}, {
				duration: 100,
				onFinish: function onFinish() {
					player.inAir = false;
					player.doubleJump = false;
					player.y = 2732 / 2 - 250;
				}
			});
		}
	};
	// Add up event to reset rotation
	self.up = function (x, y, obj) {
		if (!player.inAir && !player.doubleJump) {
			player.rotation += Math.PI / 2.25; // Rotate back 80 degrees clockwise
		} else if (player.inAir || player.doubleJump) {
			player.rotation += Math.PI / 2.25; // Rotate back 80 degrees clockwise
		}
	};
});
// Create a button top class
var ButtonTop = Container.expand(function () {
	var self = Container.call(this);
	var buttonTopGraphics = self.attachAsset('BUTTON_TOP', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add down event to trigger jump
	self.down = function (x, y, obj) {
		if (!player.doubleJump) {
			if (player.inAir) {
				player.doubleJump = true;
				tween(player, {
					y: player.y - 400,
					rotation: player.rotation - Math.PI * 2
				}, {
					duration: 230,
					easing: tween.easeInOut,
					onFinish: function onFinish() {
						tween(player, {
							y: 2732 / 2 - 250
						}, {
							duration: 500,
							onFinish: function onFinish() {
								player.inAir = false;
								player.doubleJump = false;
								player.y = 2732 / 2 - 250;
							}
						});
					}
				});
				return;
			}
			player.inAir = true;
			tween(player, {
				y: player.y - 400
			}, {
				duration: 100,
				onFinish: function onFinish() {
					tween(player, {
						y: 2732 / 2 - 250
					}, {
						duration: 700,
						onFinish: function onFinish() {
							player.inAir = false;
						}
					});
				}
			});
		}
	};
});
// Create a player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('character', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Initialize the inAir flag
	self.inAir = false;
	self.doubleJump = false;
});

/**** 
* Initialize Game
****/ 
// Add player to the game
var game = new LK.Game({
	backgroundColor: 0x808080
});

/**** 
* Game Code
****/ 
LK.setTimeout(function () {
	vzriv = game.addChild(LK.getAsset('Vzriv', {
		anchorX: 0.5,
		anchorY: 0.5
	}));
	vzriv.x = vzriv.width / 2 + 90; // Position Vzriv at the left center of the screen
	vzriv.y = 2732 / 2 - 280; // Center Vzriv vertically
	game.setChildIndex(player, game.children.length - 1); // Ensure player is on top
	// Remove Vzriv 2.1 seconds after the game starts
	LK.setTimeout(function () {
		vzriv.destroy();
	}, 2100);
}, 1860);
// Add USKORENIE image to the left center of the screen
var uskorenie = LK.getAsset('Uskorenie', {
	anchorX: 0.5,
	// Center horizontally
	anchorY: 0.5 // Center vertically
});
uskorenie.x = uskorenie.width / 2 + 120; // Position at the left center of the screen
uskorenie.y = 2732 / 2 - 280; // Center vertically
game.addChild(uskorenie);
game.setChildIndex(uskorenie, game.children.length - 1); // Ensure Uskorenie is on top
// Add player to the game
var ball = game.addChild(LK.getAsset('Ball', {
	anchorX: 0.5,
	anchorY: 0.5
}));
ball.x = ball.width / 2 - 100; // Shift ball 100 pixels to the left
ball.y = 2732 / 2 - 300; // Center ball vertically
LK.setTimeout(function () {
	tween(ball, {
		x: ball.x + 400
	}, {
		duration: 360,
		// Reduced duration to double the speed 
		easing: tween.linear,
		onFinish: function onFinish() {
			ball.destroy(); // Remove the ball after it moves 200 pixels 
		}
	});
}, 1500);
game.down = function (x, y, obj) {};
var player = game.addChild(new Player());
player.x = player.width / 2 + 200; // Position player 200 units to the right of the center left of the screen
player.y = 2732 / 2 - 250; // Move player 150 units down
player.rotation = Math.PI / 12; // Set initial rotation to 15 degrees clockwise
// Add background to the game
var background = game.addChild(LK.getAsset('background_1', {
	anchorX: 0.5,
	anchorY: 0.5
}));
game.setChildIndex(background, 0); // Move background to the bottom
background.x = 2048 / 2; // Center background horizontally
background.y = 2732 / 2 + 150; // Move background down by 550 pixels
background.rotation = Math.PI / 9; // Rotate background by 20 degrees clockwise
// Move background_1 towards its left side
var backgroundCounter = 0;
var backgroundTimer = LK.setInterval(function () {
	var newBackground = game.addChild(LK.getAsset('background_1', {
		anchorX: 0.5,
		anchorY: 0.5
	}));
	newBackground.x = 2048 / 2 + 2500; // Move background 2048 pixels to the right
	newBackground.y = 2732 / 2 + 1060; // Move background down by 1100 pixels
	newBackground.rotation = Math.PI / 9; // Rotate background by 20 degrees clockwise
	backgroundCounter++;
	if (backgroundCounter === 1) {
		LK.clearInterval(backgroundTimer);
		backgroundTimer = LK.setInterval(function () {
			var newBackground = game.addChild(LK.getAsset('background_1', {
				anchorX: 0.5,
				anchorY: 0.5
			}));
			newBackground.x = 2048 / 2 + 2500; // Move background 2048 pixels to the right
			newBackground.y = 2732 / 2 + 1060; // Move background down by 1100 pixels
			newBackground.rotation = Math.PI / 9; // Rotate background by 20 degrees clockwise
		}, 3200);
	} else if (backgroundCounter === 2) {
		LK.clearInterval(backgroundTimer);
		backgroundTimer = LK.setInterval(function () {
			var newBackground = game.addChild(LK.getAsset('background_1', {
				anchorX: 0.5,
				anchorY: 0.5
			}));
			newBackground.x = 2048 / 2 + 2500; // Move background 2048 pixels to the right
			newBackground.y = 2732 / 2 + 1060; // Move background down by 1100 pixels
			newBackground.rotation = Math.PI / 9; // Rotate background by 20 degrees clockwise
		}, 1000);
	}
}, 500);
var gameStarted = false;
var gameStartTimer = LK.setTimeout(function () {
	gameStarted = true;
}, 2000);
// Add BUTTON_TOP to the game
var buttonTop = game.addChild(new ButtonTop());
buttonTop.x = 2048 - buttonTop.width / 2 - 20; // Position buttonTop 20 units to the left of the right edge of the screen
buttonTop.y = 2732 - buttonTop.height / 2 - 320; // Position buttonTop 320 units above the bottom edge of the screen
// Add BUTTON_BOT to the game
var buttonBot = game.addChild(new ButtonBot());
buttonBot.x = 2048 - buttonBot.width / 2 - 20; // Position buttonBot 20 units to the left of the right edge of the screen
buttonBot.y = 2732 - buttonBot.height / 2 - 20; // Position buttonBot 20 units above the bottom edge of the screen
game.update = function () {
	if (!gameStarted) {
		buttonTop.interactive = false;
		buttonBot.interactive = false;
		return;
	}
	buttonTop.interactive = true;
	buttonBot.interactive = true;
	game.children.forEach(function (child) {
		if (child !== player && child !== buttonTop && child !== buttonBot && child !== uskorenie) {
			child.x -= 15 * Math.cos(child.rotation); // Increase the speed by 1.5 times
			child.y -= 15 * Math.sin(child.rotation); // Increase the speed by 1.5 times
			if (child.x + child.width / 2 < 0) {
				// If the right edge of the background is less than 0 (completely off the screen)
				child.destroy(); // Remove the background
			}
		}
		game.setChildIndex(player, game.children.length - 1); // Move player to the top
	});
	// Add shaking effect to the player
	if (gameStarted) {
		if (LK.ticks < 130) {
			// Strong shake for the first second (assuming 60 FPS)
			player.x += Math.sin(LK.ticks / 0.5) * 10;
			player.y += Math.cos(LK.ticks / 0.5) * 10;
		} else {
			player.x += Math.sin(LK.ticks / 0.5) * 3;
			player.y += Math.cos(LK.ticks / 0.5) * 3;
		}
		if (vzriv && vzriv.parent) {
			vzriv.destroy();
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -119,9 +119,9 @@
 * Initialize Game
 ****/ 
 // Add player to the game
 var game = new LK.Game({
-	backgroundColor: 0x000000
+	backgroundColor: 0x808080
 });
 
 /**** 
 * Game Code