How do I accumulate score

Every time that the player plays the game, generates certain score but what I want to do is to acumulate that score with local storage

Note: I alredy have a highscore local storage

So, why doesn't it work?

it doesnt acumulates score

Are you actually adding it and not subtracting somewhere else (or resetting it somewhere)?

Naw, he is probally setting it = ItemValue instead of + ItemValue

why dont you use add to value expression? instead of set value to?