/**** 
* Classes
****/ 
// Class for Birds
var Bird = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = function () {
		self.x -= self.speed;
	};
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Class for the Excavator
var Excavator = Container.expand(function () {
	var self = Container.call(this);
	var excavatorGraphics = self.attachAsset('excavator', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.jumpHeight = 500;
	self.isJumping = false;
	self.jumpSpeed = 20;
	self.originalY = 0;
	self.jumpCount = 0; // Initialize jump counter
	self.jump = function () {
		if (!self.isJumping && self.jumpCount < 2) {
			// Check if the excavator is not jumping and has jumped less than twice
			self.isJumping = true;
			self.originalY = self.y;
			self.jumpCount++; // Increment jump counter
		}
	};
	self.update = function () {
		if (self.isJumping) {
			self.y -= self.jumpSpeed;
			if (self.y <= self.originalY - self.jumpHeight * 3) {
				self.isJumping = false;
				self.jumpCount = 0; // Reset jump counter when the excavator lands
			}
		} else if (self.y < self.originalY) {
			self.y += self.jumpSpeed;
		}
	};
});
// Class for Trees
var Tree = Container.expand(function () {
	var self = Container.call(this);
	var treeGraphics = self.attachAsset('tree', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.isRed = false;
	self.update = function () {
		self.x -= self.speed;
	};
});

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

/**** 
* Game Code
****/ 
var excavator = game.addChild(new Excavator());
excavator.x = 200;
excavator.y = 2000;
var trees = [];
var score = 0;
var scoreTxt = new Text2('0', {
	size: 150,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
game.down = function (x, y, obj) {
	excavator.jump();
};
game.update = function () {
	excavator.update();
	if (LK.ticks % 60 == 0) {
		var newTree = new Tree();
		newTree.x = 2048;
		newTree.y = 2000;
		if (Math.random() < 0.2) {
			newTree.isRed = true;
			newTree.attachAsset('redTree', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		}
		trees.push(newTree);
		game.addChild(newTree);
		// Add birds only if there are no red trees below and with a 50% probability
		if (!newTree.isRed && Math.random() < 0.5) {
			var newBird = new Bird();
			newBird.x = 2048;
			newBird.y = 1000;
			trees.push(newBird);
			game.addChild(newBird);
		}
	}
	for (var i = trees.length - 1; i >= 0; i--) {
		var tree = trees[i];
		tree.update();
		if (tree.x < -100) {
			tree.destroy();
			trees.splice(i, 1);
			continue;
		}
		if (excavator.intersects(tree)) {
			if (tree instanceof Bird) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				return;
			} else if (tree.isRed && !excavator.isJumping) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				return;
			} else if (!tree.isRed) {
				score++;
				scoreTxt.setText(score);
				tree.destroy();
				trees.splice(i, 1);
				if (score >= 50) {
					LK.showYouWin();
				}
			}
		} else if (tree.isRed) {
			for (var j = trees.length - 1; j >= 0; j--) {
				var normalTree = trees[j];
				if (!normalTree.isRed && tree.intersects(normalTree)) {
					normalTree.destroy();
					trees.splice(j, 1);
				}
			}
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -134,7 +134,15 @@
 				if (score >= 50) {
 					LK.showYouWin();
 				}
 			}
+		} else if (tree.isRed) {
+			for (var j = trees.length - 1; j >= 0; j--) {
+				var normalTree = trees[j];
+				if (!normalTree.isRed && tree.intersects(normalTree)) {
+					normalTree.destroy();
+					trees.splice(j, 1);
+				}
+			}
 		}
 	}
 };
\ No newline at end of file