If I want to have several games inside one cartridge, what should i do to define variables for each game?

I am wondering how to define individual set of variables for each game.

for eg, I defined TestArray .ds 50 at the beginning of Page Zero.
Therefore, addresses $00 to $32 will be reserved for TestArray

Game 1 will be getting access to this TestArray. If Game 2 need to get access
to the same memory space, what should I do then? Using the same variable name as in Game 1?

Brian