===================================================================
--- original.js
+++ change.js
@@ -1,110 +1,110 @@
-/****
+/**** 
 * Classes
-****/
+****/ 
 // 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 = -15;
-  self.update = function () {
-    self.y += self.speed;
-    if (self.y < 0) {
-      self.destroy();
-    }
-  };
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('bullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -15 - Math.floor(LK.getScore() / 10);
+	self.update = function () {
+		self.y += self.speed;
+		if (self.y < 0) {
+			self.destroy();
+		}
+	};
 });
 // 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 = 5;
-  self.update = function () {
-    self.y += self.speed;
-    if (self.y > 2732) {
-      self.destroy();
-    }
-  };
+	var self = Container.call(this);
+	var enemyGraphics = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 5 + Math.floor(LK.getScore() / 10);
+	self.update = function () {
+		self.y += self.speed;
+		if (self.y > 2732) {
+			self.destroy();
+		}
+	};
 });
 //<Assets used in the game will automatically appear here>
 //<Write imports for supported plugins here>
 // Hero class
 var Hero = Container.expand(function () {
-  var self = Container.call(this);
-  var heroGraphics = self.attachAsset('hero', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 10;
-  self.update = function () {
-    // Hero update logic
-  };
+	var self = Container.call(this);
+	var heroGraphics = self.attachAsset('hero', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 10;
+	self.update = function () {
+		// Hero update logic
+	};
 });
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-  backgroundColor: 0x000000 //Init game with black background 
+	backgroundColor: 0x000000 //Init game with black background 
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
 var hero = game.addChild(new Hero());
 hero.x = 2048 / 2;
 hero.y = 2500;
 var enemies = [];
 var bullets = [];
 var score = 0;
 function spawnEnemy() {
-  var enemy = new Enemy();
-  enemy.x = Math.random() * 2048;
-  enemy.y = 0;
-  enemies.push(enemy);
-  game.addChild(enemy);
+	var enemy = new Enemy();
+	enemy.x = Math.random() * 2048;
+	enemy.y = 0;
+	enemies.push(enemy);
+	game.addChild(enemy);
 }
 function shootBullet() {
-  var bullet = new Bullet();
-  bullet.x = hero.x;
-  bullet.y = hero.y;
-  bullets.push(bullet);
-  game.addChild(bullet);
+	var bullet = new Bullet();
+	bullet.x = hero.x;
+	bullet.y = hero.y;
+	bullets.push(bullet);
+	game.addChild(bullet);
 }
 game.down = function (x, y, obj) {
-  hero.x = x;
-  hero.y = y;
+	hero.x = x;
+	hero.y = y;
 };
 game.update = function () {
-  if (LK.ticks % 60 === 0) {
-    spawnEnemy();
-  }
-  for (var i = enemies.length - 1; i >= 0; i--) {
-    enemies[i].update();
-    if (enemies[i].intersects(hero)) {
-      LK.effects.flashScreen(0xff0000, 1000);
-      LK.showGameOver();
-    }
-  }
-  for (var j = bullets.length - 1; j >= 0; j--) {
-    bullets[j].update();
-    for (var k = enemies.length - 1; k >= 0; k--) {
-      if (bullets[j].intersects(enemies[k])) {
-        score += 1;
-        bullets[j].destroy();
-        enemies[k].destroy();
-        bullets.splice(j, 1);
-        enemies.splice(k, 1);
-        break;
-      }
-    }
-  }
-  if (LK.ticks % 15 === 0) {
-    shootBullet();
-  }
+	if (LK.ticks % Math.max(10, 60 - Math.floor(LK.getScore() / 10)) === 0) {
+		spawnEnemy();
+	}
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		enemies[i].update();
+		if (enemies[i].intersects(hero)) {
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.showGameOver();
+		}
+	}
+	for (var j = bullets.length - 1; j >= 0; j--) {
+		bullets[j].update();
+		for (var k = enemies.length - 1; k >= 0; k--) {
+			if (bullets[j].intersects(enemies[k])) {
+				score += 1;
+				bullets[j].destroy();
+				enemies[k].destroy();
+				bullets.splice(j, 1);
+				enemies.splice(k, 1);
+				break;
+			}
+		}
+	}
+	if (LK.ticks % 15 === 0) {
+		shootBullet();
+	}
 };
\ No newline at end of file