Help with multiple levels

alright so I'm using an attribute for keeping the score of the game and when ever the user gets enough points the scene is going to change, so I was wondering if I could re-use that attribute for the next level or do I have to create a new attribute for every level.
Comments
Ex: At the end of the level, a "next level" button appears. When you click on it, the scene will change AND the score will change to 0.