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

/**** 
* Classes
****/ 
var Bird = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityY = 0;
	self.gravity = 0.8;
	self.flapPower = -12;
	self.rotation = 0;
	self.rotationVelocity = 0;
	self.isFlipping = false;
	self.completedFlips = 0;
	self.lastUpright = true;
	self.flap = function () {
		self.velocityY = self.flapPower;
		self.rotationVelocity = 0.3;
		self.isFlipping = true;
		LK.getSound('flap').play();
	};
	self.update = function () {
		// Apply gravity
		self.velocityY += self.gravity;
		self.y += self.velocityY;
		// Apply rotation
		if (self.isFlipping) {
			self.rotation += self.rotationVelocity;
			self.rotationVelocity *= 0.98; // Slow down rotation
			// Check if completed a full rotation
			if (self.rotation >= Math.PI * 2) {
				self.completedFlips++;
				self.rotation = 0;
				self.isFlipping = false;
			}
		}
		birdGraphics.rotation = self.rotation;
		// Keep bird in bounds horizontally
		if (self.x < 40) self.x = 40;
		if (self.x > 2008) self.x = 2008;
	};
	self.isUpright = function () {
		var normalizedRotation = self.rotation % (Math.PI * 2);
		return normalizedRotation < 0.3 || normalizedRotation > Math.PI * 2 - 0.3;
	};
	return self;
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	// Choose random obstacle type
	var obstacleTypes = ['spike', 'block', 'tallBlock', 'platform'];
	var randomType = obstacleTypes[Math.floor(Math.random() * obstacleTypes.length)];
	var obstacleGraphics = self.attachAsset(randomType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -3;
	self.passed = false;
	self.obstacleType = randomType;
	// Add visual effects for Geometry Dash style
	self.pulseScale = 1;
	self.pulseDirection = 1;
	self.rotationSpeed = 0;
	// Set rotation speed for certain types
	if (randomType === 'spike' || randomType === 'block') {
		self.rotationSpeed = 0.05;
	}
	self.update = function () {
		self.x += self.speed;
		// Add pulsing effect
		self.pulseScale += 0.02 * self.pulseDirection;
		if (self.pulseScale > 1.2) self.pulseDirection = -1;
		if (self.pulseScale < 0.9) self.pulseDirection = 1;
		obstacleGraphics.scaleX = self.pulseScale;
		obstacleGraphics.scaleY = self.pulseScale;
		// Add rotation for certain obstacles
		if (self.rotationSpeed > 0) {
			obstacleGraphics.rotation += self.rotationSpeed;
		}
	};
	return self;
});

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

/**** 
* Game Code
****/ 
var bird;
var obstacles = [];
var ground;
var gameStarted = false;
var lastObstacle = 0;
var obstacleSpacing = 200;
// Create score display
var scoreTxt = new Text2('0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.y = 100;
// Create instructions
var instructionTxt = new Text2('TAP TO FLIP AND FLY\nLAND UPRIGHT TO SCORE!', {
	size: 60,
	fill: 0xFFFFFF
});
instructionTxt.anchor.set(0.5, 0.5);
game.addChild(instructionTxt);
instructionTxt.x = 1024;
instructionTxt.y = 1000;
// Create ground
ground = game.addChild(LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 0
}));
ground.x = 0;
ground.y = 2632;
// Create bird
bird = game.addChild(new Bird());
bird.x = 300;
bird.y = 1366;
// Create initial obstacles at game start
createObstacle();
function startGame() {
	if (!gameStarted) {
		gameStarted = true;
		game.removeChild(instructionTxt);
	}
}
function createObstacle() {
	// Create walls that cover full screen with a gap for the bird
	var baseX = 2148;
	var gapSize = 250; // Size of the gap for bird to pass through
	var gapPosition = Math.random() * (2200 - gapSize) + 300; // Random gap position between 300-2200
	var obstacleHeight = 400; // Height of each obstacle segment
	var numSegments = Math.ceil(2732 / obstacleHeight); // Number of segments to cover full height
	for (var i = 0; i < numSegments; i++) {
		var segmentY = i * obstacleHeight + obstacleHeight / 2;
		// Skip creating obstacles in the gap area
		if (segmentY + obstacleHeight / 2 > gapPosition && segmentY - obstacleHeight / 2 < gapPosition + gapSize) {
			continue;
		}
		var obstacle = new Obstacle();
		obstacle.x = baseX;
		obstacle.y = segmentY;
		obstacles.push(obstacle);
		game.addChild(obstacle);
	}
	lastObstacle = LK.ticks;
}
function checkCollisions() {
	// Check ground collision
	if (bird.y + 30 >= ground.y) {
		if (!bird.isUpright()) {
			LK.showGameOver();
			return;
		} else {
			// Successful landing - award points
			if (bird.completedFlips > 0) {
				LK.setScore(LK.getScore() + bird.completedFlips);
				scoreTxt.setText(LK.getScore());
				LK.getSound('score').play();
				bird.completedFlips = 0;
				// Bounce back up
				bird.velocityY = -8;
				bird.y = ground.y - 30;
			}
		}
	}
	// Check obstacle collisions
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		if (bird.intersects(obstacle)) {
			LK.showGameOver();
			return;
		}
		// Check if bird passed obstacle
		if (!obstacle.passed && obstacle.x + 75 < bird.x) {
			obstacle.passed = true;
			if (bird.isUpright() && bird.completedFlips > 0) {
				LK.setScore(LK.getScore() + 1);
				scoreTxt.setText(LK.getScore());
				LK.getSound('score').play();
			}
		}
		// Remove off-screen obstacles
		if (obstacle.x < -100) {
			// Add flash effect when obstacle disappears
			LK.effects.flashObject(obstacle, 0xffffff, 200);
			obstacle.destroy();
			obstacles.splice(i, 1);
		}
	}
	// Check ceiling collision
	if (bird.y < 50) {
		bird.y = 50;
		bird.velocityY = 0;
	}
}
game.down = function (x, y, obj) {
	if (!gameStarted) {
		startGame();
	}
	bird.flap();
};
game.update = function () {
	if (!gameStarted) return;
	// Create obstacles
	if (LK.ticks - lastObstacle > obstacleSpacing) {
		createObstacle();
	}
	// Update bird physics
	bird.update();
	// Update obstacles
	for (var i = 0; i < obstacles.length; i++) {
		obstacles[i].update();
	}
	// Check collisions
	checkCollisions();
	// Increase difficulty over time - progressively reduce obstacle spacing
	var baseSpacing = 200;
	var minSpacing = 120;
	var reductionRate = 3; // Reduce spacing by 3 pixels per point scored
	var currentSpacing = baseSpacing - LK.getScore() * reductionRate;
	obstacleSpacing = Math.max(minSpacing, currentSpacing);
};

===================================================================
--- original.js
+++ change.js
@@ -229,12 +229,11 @@
 		obstacles[i].update();
 	}
 	// Check collisions
 	checkCollisions();
-	// Increase difficulty over time
-	if (LK.getScore() > 10) {
-		obstacleSpacing = 180;
-	}
-	if (LK.getScore() > 20) {
-		obstacleSpacing = 150;
-	}
+	// Increase difficulty over time - progressively reduce obstacle spacing
+	var baseSpacing = 200;
+	var minSpacing = 120;
+	var reductionRate = 3; // Reduce spacing by 3 pixels per point scored
+	var currentSpacing = baseSpacing - LK.getScore() * reductionRate;
+	obstacleSpacing = Math.max(minSpacing, currentSpacing);
 };
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