The old version of the map is very difficult. It's mostly grandmaster with a few cracked rooms. And it's longer than 7d. This version tells a story of challenging oneself and overcoming seemingly impossible obstacles. The new version however has been nerfed in both precision and length. It's now mostly expert with a few intermediate rooms. This version provides streamlined, polished gameplay and a more casual experience. Both versions are included in the pack, with chapter 1 being the new version and chapter 2 being the old version. You can use assist mode to unlock chapter 2.