static void initialize() {
        try {
            SHIP = ImageIO.read(SpaceShooter.class.getResourceAsStream("img/player/ship.png"));
            MISSILE = ImageIO.read(SpaceShooter.class.getResourceAsStream("img/player/missile.png"));
            PLASMA = ImageIO.read(SpaceShooter.class.getResourceAsStream("img/enemy/plasma.png"));
            DRONE = ImageIO.read(SpaceShooter.class.getResourceAsStream("img/enemy/drone.png"));
            ALIEN = ImageIO.read(SpaceShooter.class.getResourceAsStream("img/enemy/alien.png"));
            MOTHERSHIP = ImageIO.read(SpaceShooter.class.getResourceAsStream("img/enemy/mothership.png"));
            HEALTH = ImageIO.read(SpaceShooter.class.getResourceAsStream("img/debris/health.png"));
            
            for (int i = 0; i < ASTEROID_SPRITES; i++) ASTEROID[i] = ImageIO.read(SpaceShooter.class.getResourceAsStream("img/debris/asteroid" + i + ".png"));
            for (int i = 0; i < EXPLOSION_SPRITES; i++) EXPLOSION[i] = ImageIO.read(SpaceShooter.class.getResourceAsStream("img/explosions/explosion" + i + ".png"));
            for (int i = 0; i < ROCK_SPRITES; i++) ROCK[i] = ImageIO.read(SpaceShooter.class.getResourceAsStream("img/debris/rock" + i + ".png"));
            for (int i = 0; i < METAL_SPRITES; i++) METAL[i] = ImageIO.read(SpaceShooter.class.getResourceAsStream("img/debris/metal" + i + ".png"));
        }
        catch (IOException ex) {
            System.err.println(ex);
        }
    }