===================================================================
--- original.js
+++ change.js
@@ -20,14 +20,18 @@
 	self.speed = Math.random() * (6 - 4) + 4;
 	self.hit = false;
 	self._move_migrated = function () {
 		if (self.hit) {
-			var angle = 70 * (Math.PI / 180); // Convert angle to radians
-			self.x += 15 * Math.cos(angle); // Move horizontally based on the angle
-			self.y += 15 * Math.sin(angle); // Move vertically based on the angle
-			self.scale.x -= 15 / 60 / enemyGraphics.width; // Decrease width by 20 pixels per second
-			self.scale.y -= 15 / 60 / enemyGraphics.height; // Decrease height by 20 pixels per second
-			self.rotation += Math.PI / 4 / 60; // Rotate by 45 degrees per second
+			// Pre-calculate angle to optimize runtime calculations
+			var hitMovementSpeed = 15;
+			var hitAngleRadians = Math.PI * 70 / 180; // Pre-convert angle to radians
+			self.x += hitMovementSpeed * Math.cos(hitAngleRadians);
+			self.y += hitMovementSpeed * Math.sin(hitAngleRadians);
+			// Optimize scaling and rotation to reduce calculations
+			var scaleDecrement = 15 / 60;
+			self.scale.x -= scaleDecrement / enemyGraphics.width;
+			self.scale.y -= scaleDecrement / enemyGraphics.height;
+			self.rotation += Math.PI / 180 * 45 / 60; // Simplify rotation calculation
 		} else {
 			self.x += self.speed;
 			if (self.id % 3 == 0) {
 				self.y += 1.8 * Math.sin(LK.ticks / 60); // Move up and down smoothly by 30
@@ -44,12 +48,17 @@
 		anchorY: 0.5
 	});
 	self.speed = -22;
 	self._move_migrated = function () {
-		self.x += self.speed * Math.cos(this.direction);
-		self.y += self.speed * Math.sin(this.direction);
-		self.scale.x -= 10 / 60 / bulletGraphics.width; // Decrease width by 3 pixels per second
-		self.scale.y -= 10 / 60 / bulletGraphics.height; // Decrease height by 3 pixels per second
+		// Optimized bullet movement and scaling to reduce calculations per frame
+		var deltaX = self.speed * Math.cos(this.direction);
+		var deltaY = self.speed * Math.sin(this.direction);
+		self.x += deltaX;
+		self.y += deltaY;
+		// Simplified scaling to reduce per frame calculations
+		var scaleDecrement = 10 / 60;
+		self.scale.x -= scaleDecrement / bulletGraphics.width;
+		self.scale.y -= scaleDecrement / bulletGraphics.height;
 	};
 	self.distanceTo = function (other) {
 		var dx = other.x - this.x;
 		var dy = other.y - this.y;
@@ -127,9 +136,12 @@
 background.x = 1024; // Center horizontally
 background.y = 1366; // Center vertically
 var playerBullets = [];
 var enemies = [];
-var spawnEnemyInterval = 190; // Frames until next enemy spawns
+// Dynamically adjust enemy spawn interval based on score to optimize game difficulty
+var baseSpawnInterval = 190;
+var spawnEnemyInterval = baseSpawnInterval - Math.floor(LK.getScore() / 10) * 5;
+spawnEnemyInterval = Math.max(spawnEnemyInterval, 100); // Ensure minimum spawn interval
 var enemySpawnTimer = 0;
 // Function to spawn enemies
 function spawnEnemy() {
 	var enemySize = Math.random() * (200 - 130) + 130;