===================================================================
--- original.js
+++ change.js
@@ -1,56 +1,22 @@
-var LargeTree = Container.expand(function () {
+var Obstruction = Container.expand(function (parent, x, y, type) {
 	var self = Container.call(this);
-	self.graphics = self.createAsset('largeTree', 'Large Tree', 0.5, 1);
-	self.hitbox = new Container();
-	self.hitbox.width = self.graphics.width;
-	self.hitbox.height = self.graphics.width / 2;
-	self.hitbox.y = -self.hitbox.height;
-	self.addChild(self.hitbox);
+	parent.addChild(self);
+	self.x = x;
+	self.y = y;
+	var graphics = self.createAsset(type, 'Obstruction graphics', 0.5, 1);
+	var randomScale = 0.9 + Math.random() * 0.2;
+	self.scale.set(randomScale, randomScale);
+	self.hitbox = self.createAsset('hitbox', 'Obstruction hitbox', 0.5, 0.5);
+	self.hitbox.width = graphics.width;
+	self.hitbox.height = graphics.width / 2;
 });
-var SmallTree = Container.expand(function () {
-	var self = Container.call(this);
-	self.graphics = self.createAsset('smallTree', 'Small Tree', 0.5, 1);
-	self.hitbox = new Container();
-	self.hitbox.width = self.graphics.width;
-	self.hitbox.height = self.graphics.width / 2;
-	self.hitbox.y = -self.hitbox.height;
-	self.addChild(self.hitbox);
-});
-var Rock = Container.expand(function () {
-	var self = Container.call(this);
-	self.graphics = self.createAsset('rock', 'Rock', 0.5, 1);
-	self.hitbox = new Container();
-	self.hitbox.width = self.graphics.width;
-	self.hitbox.height = self.graphics.width / 2;
-	self.hitbox.y = -self.hitbox.height;
-	self.addChild(self.hitbox);
-});
-var Stump = Container.expand(function () {
-	var self = Container.call(this);
-	self.graphics = self.createAsset('stump', 'Stump', 0.5, 1);
-	self.hitbox = new Container();
-	self.hitbox.width = self.graphics.width;
-	self.hitbox.height = self.graphics.width / 2;
-	self.hitbox.y = -self.hitbox.height;
-	self.addChild(self.hitbox);
-});
-var DeadTree = Container.expand(function () {
-	var self = Container.call(this);
-	self.graphics = self.createAsset('deadTree', 'Dead Tree', 0.5, 1);
-	self.hitbox = new Container();
-	self.hitbox.width = self.graphics.width;
-	self.hitbox.height = self.graphics.width / 2;
-	self.hitbox.y = -self.hitbox.height;
-	self.addChild(self.hitbox);
-});
 var Player = Container.expand(function () {
 	var self = Container.call(this);
-	self.playerGraphics = self.createAsset('player', 'Player character', 0.575, 0.5);
+	self.playerGraphics = self.createAsset('player', 'Player character', 0.575, 1);
 	self.platformGraphics = self.createAsset('platform', 'Platform image', 0.5, 0.5);
-	self.platformGraphics.y = self.playerGraphics.height / 2;
 	self.addChild(self.playerGraphics);
-	self.hitbox = new Container();
+	self.hitbox = self.createAsset('hitbox', 'Player Hitbox', 0.5, 0.5);
 	self.hitbox.width = 1;
 	self.hitbox.height = 1;
 	self.hitbox.x = 0;
 	self.hitbox.y = self.playerGraphics.height / 2;
@@ -145,16 +111,11 @@
 			spawnObstruction(randomX, stageHeight + 200);
 		}
 	}
 	function spawnObstruction(x, y) {
-		var obstructionTypes = [LargeTree, SmallTree, Rock, Stump, DeadTree];
-		var ObstructionClass = obstructionTypes[Math.floor(Math.random() * obstructionTypes.length)];
-		var obstruction = new ObstructionClass();
-		var randomScale = 0.9 + Math.random() * 0.2;
-		obstruction.scale.set(randomScale, randomScale);
-		obstruction.scale.x *= Math.random() < 0.5 ? -1 : 1;
-		obstruction.x = x;
-		obstruction.y = y;
+		var obstructionTypes = ['largeTree', 'smallTree', 'deadTree', 'rock', 'stump'];
+		var obstructionType = obstructionTypes[Math.floor(Math.random() * obstructionTypes.length)];
+		var obstruction = new Obstruction(self, x, y, obstructionType);
 		self.obstructions.push(obstruction);
 		self.addChild(obstruction);
 	}
 	function updatePosition(event) {