Rolling Into Another World With My D20

After completing a Tabletop RPG campaign the players including the DM are transported into their RPG world. They find themselves back at the beginning at level one but with a small twist, their powers, skills, and class levels have somehow carried over. Not only that but at a whelm the DM can change the world around them with ease. Now they must once again go through their campaign as they feel this is they're best way to get home.