Very simple heaps example

Game.hx

import h2d.Scene;
import h2d.Graphics;
import hxd.App;
import hxd.Key;

class Game extends App
{

	static function main() new Game();

	var player:Player;

	override function init()
	{
		player = new Player(this.s2d);
	}

	override function update(dt)
	{
		player.player_move(10);
	}

}

class Player extends Graphics
{

	public function new(scene:Scene)
	{
		super(scene);

		beginFill(0xffffff);
		drawRect(0, 0, 30, 30);
		endFill();
	}

	public function player_move(speed:Float)
	{
		if (Key.isDown(Key.A)) x -= speed;
		if (Key.isDown(Key.D)) x += speed;
	}

}