How do I player purchase

good morning,

I am making a game in which you collect coins and then you can buy new characters with them, but when using the localstorage variable, I do not save the purchase of the player.

some help?

you have to use array here for saving your purchase values

This is on my list for tutorials

I will make tutorial on this

How to purchase character using earned points or unlock new levels

I do not understand very well what it says to me, I was watching its tutorials and I do not see any that fit to what I look for.

what would?