Scope of variables

Hi,

I was trying to design a multiplayer scenario where the students try to solve some challenges using the code builder. I would like to use an integer variable that stores the score of every student (player) and increases its value every time a player solves one of the multiple challenges they are going to find in the world.

I was thinking about the following approach: to have a "global" array of scores, so that every student can update his corresponding score in the array from his codebuilder

I don't see any option to change the scope of a variable in makecode, neither to create a list / array. If you could think about an approach that could help me to solve my problem, I would be glad to know.