/**** 
* Classes
****/ 
//<Assets used in the game will automatically appear here>
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.update = function () {
		self.x += self.speed * Math.cos(self.rotation);
		self.y += self.speed * Math.sin(self.rotation);
	};
});
// Enemy class
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.update = function () {
		var dx = player.x - self.x;
		var dy = player.y - self.y;
		var angle = Math.atan2(dy, dx);
		self.x += self.speed * Math.cos(angle);
		self.y += self.speed * Math.sin(angle);
	};
});
// FastEnemy class
var FastEnemy = Container.expand(function () {
	var self = Container.call(this);
	var fastEnemyGraphics = self.attachAsset('fastEnemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.update = function () {
		var dx = player.x - self.x;
		var dy = player.y - self.y;
		var angle = Math.atan2(dy, dx);
		self.x += self.speed * Math.cos(angle);
		self.y += self.speed * Math.sin(angle);
	};
});
// Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('character', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.rotation = 0;
	self.bullets = [];
	self.shoot = function () {
		var bullet = new Bullet();
		bullet.x = self.x;
		bullet.y = self.y;
		bullet.rotation = self.rotation;
		self.bullets.push(bullet);
		game.addChild(bullet);
	};
});

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

/**** 
* Game Code
****/ 
// Initialize player
var player = new Player();
player.x = 2048 / 2;
player.y = 2732 / 2;
game.addChild(player);
// Initialize score
var score = 0;
var scoreTxt = new Text2(score.toString(), {
	size: 100,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0); // Sets anchor to the top middle of the text.
LK.gui.top.addChild(scoreTxt);
// Handle mouse move to rotate player
game.move = function (x, y, obj) {
	var localPos = game.toLocal(obj.global);
	var dx = localPos.x - player.x;
	var dy = localPos.y - player.y;
	player.rotation = Math.atan2(dy, dx);
};
// Handle mouse down to shoot
var lastShot = 0;
var mouseDown = false;
game.down = function (x, y, obj) {
	mouseDown = true;
};
game.up = function (x, y, obj) {
	mouseDown = false;
};
// Update game state
// Initialize enemies array
var enemies = [];
game.update = function () {
	// Create enemies at random points along the edge
	var spawnRate = 1.5 + 1.5 * Math.min(1, score / 1200);
	if (LK.ticks % Math.floor(60 / spawnRate) == 0) {
		var enemy = new Enemy();
		var side = Math.floor(Math.random() * 4);
		switch (side) {
			case 0:
				// top
				enemy.x = Math.random() * 2048;
				enemy.y = 0;
				break;
			case 1:
				// right
				enemy.x = 2048;
				enemy.y = Math.random() * 2732;
				break;
			case 2:
				// bottom
				enemy.x = Math.random() * 2048;
				enemy.y = 2732;
				break;
			case 3:
				// left
				enemy.x = 0;
				enemy.y = Math.random() * 2732;
				break;
		}
		enemies.push(enemy);
		game.addChild(enemy);
	}
	var fastEnemySpawnRate = 1 / 16 + 1 / 16 * Math.max(1, score / 1200);
	if (LK.ticks % Math.floor(60 / fastEnemySpawnRate) == 0) {
		var fastEnemy = new FastEnemy();
		var side = Math.floor(Math.random() * 4);
		switch (side) {
			case 0:
				// top
				fastEnemy.x = Math.random() * 2048;
				fastEnemy.y = 0;
				break;
			case 1:
				// right
				fastEnemy.x = 2048;
				fastEnemy.y = Math.random() * 2732;
				break;
			case 2:
				// bottom
				fastEnemy.x = Math.random() * 2048;
				fastEnemy.y = 2732;
				break;
			case 3:
				// left
				fastEnemy.x = 0;
				fastEnemy.y = Math.random() * 2732;
				break;
		}
		enemies.push(fastEnemy);
		game.addChild(fastEnemy);
	}
	if (mouseDown && LK.ticks - lastShot >= 24) {
		// 24 ticks is approximately 0.4 seconds
		player.shoot();
		lastShot = LK.ticks;
	}
	for (var i = player.bullets.length - 1; i >= 0; i--) {
		player.bullets[i].update();
		if (player.bullets[i].x < 0 || player.bullets[i].x > 2048 || player.bullets[i].y < 0 || player.bullets[i].y > 2732) {
			player.bullets[i].destroy();
			player.bullets.splice(i, 1);
		} else {
			for (var j = enemies.length - 1; j >= 0; j--) {
				if (player.bullets[i].intersects(enemies[j])) {
					player.bullets[i].destroy();
					player.bullets.splice(i, 1);
					enemies[j].destroy();
					enemies.splice(j, 1);
					// Increase score and update score text
					score += 10;
					scoreTxt.setText(score.toString());
					break;
				}
			}
		}
	}
	for (var j = enemies.length - 1; j >= 0; j--) {
		if (player.intersects(enemies[j])) {
			enemies[j].destroy();
			enemies.splice(j, 1);
			// Reset score to 0 and update score text
			score = 0;
			scoreTxt.setText(score.toString());
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -33,13 +33,13 @@
 });
 // FastEnemy class
 var FastEnemy = Container.expand(function () {
 	var self = Container.call(this);
-	var enemyGraphics = self.attachAsset('fastEnemy', {
+	var fastEnemyGraphics = self.attachAsset('fastEnemy', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
-	self.speed = 4; // Moves twice as fast as normal enemy
+	self.speed = 10;
 	self.update = function () {
 		var dx = player.x - self.x;
 		var dy = player.y - self.y;
 		var angle = Math.atan2(dy, dx);
@@ -75,14 +75,8 @@
 
 /**** 
 * Game Code
 ****/ 
-var powerUpActive = false;
-var powerUpEndTime = 0;
-function activatePowerUp() {
-	powerUpActive = true;
-	powerUpEndTime = LK.ticks + 360; // 6 seconds at 60 FPS
-}
 // Initialize player
 var player = new Player();
 player.x = 2048 / 2;
 player.y = 2732 / 2;
@@ -117,14 +111,9 @@
 game.update = function () {
 	// Create enemies at random points along the edge
 	var spawnRate = 1.5 + 1.5 * Math.min(1, score / 1200);
 	if (LK.ticks % Math.floor(60 / spawnRate) == 0) {
-		var enemy;
-		if (Math.random() < 1 / 12) {
-			enemy = new FastEnemy();
-		} else {
-			enemy = new Enemy();
-		}
+		var enemy = new Enemy();
 		var side = Math.floor(Math.random() * 4);
 		switch (side) {
 			case 0:
 				// top
@@ -149,16 +138,42 @@
 		}
 		enemies.push(enemy);
 		game.addChild(enemy);
 	}
-	var fireRate = powerUpActive ? 12 : 24; // Double fire rate if power-up is active
-	if (mouseDown && LK.ticks - lastShot >= fireRate) {
+	var fastEnemySpawnRate = 1 / 16 + 1 / 16 * Math.max(1, score / 1200);
+	if (LK.ticks % Math.floor(60 / fastEnemySpawnRate) == 0) {
+		var fastEnemy = new FastEnemy();
+		var side = Math.floor(Math.random() * 4);
+		switch (side) {
+			case 0:
+				// top
+				fastEnemy.x = Math.random() * 2048;
+				fastEnemy.y = 0;
+				break;
+			case 1:
+				// right
+				fastEnemy.x = 2048;
+				fastEnemy.y = Math.random() * 2732;
+				break;
+			case 2:
+				// bottom
+				fastEnemy.x = Math.random() * 2048;
+				fastEnemy.y = 2732;
+				break;
+			case 3:
+				// left
+				fastEnemy.x = 0;
+				fastEnemy.y = Math.random() * 2732;
+				break;
+		}
+		enemies.push(fastEnemy);
+		game.addChild(fastEnemy);
+	}
+	if (mouseDown && LK.ticks - lastShot >= 24) {
+		// 24 ticks is approximately 0.4 seconds
 		player.shoot();
 		lastShot = LK.ticks;
 	}
-	if (powerUpActive && LK.ticks >= powerUpEndTime) {
-		powerUpActive = false;
-	}
 	for (var i = player.bullets.length - 1; i >= 0; i--) {
 		player.bullets[i].update();
 		if (player.bullets[i].x < 0 || player.bullets[i].x > 2048 || player.bullets[i].y < 0 || player.bullets[i].y > 2732) {
 			player.bullets[i].destroy();
@@ -167,11 +182,8 @@
 			for (var j = enemies.length - 1; j >= 0; j--) {
 				if (player.bullets[i].intersects(enemies[j])) {
 					player.bullets[i].destroy();
 					player.bullets.splice(i, 1);
-					if (enemies[j] instanceof FastEnemy) {
-						activatePowerUp();
-					}
 					enemies[j].destroy();
 					enemies.splice(j, 1);
 					// Increase score and update score text
 					score += 10;