private void move()
    {
        current_space.decay();
        current_space    = space_to_move_to;
        space_to_move_to = null;
        anim.set_clip(1);

        if (!current_space.space_connected_to_goal())
        {
            // reload scene
            hit_player();
        }


        am.play(sounds[sound_index]);
        sound_index = (sound_index + 1) % sounds.Length;
        // Unlock obstackle space if you found the key
        if (current_space.is_key)
        {
            am.play("hover");
            current_space.obstacle_space.remove_obstacle();
        }
        if (current_space.is_goal)
        {
            am.play("win");
        }
    }
 public void start_game()
 {
     am.play("click");
     SceneManager.LoadScene("Level1");
 }