I would put them in an array. You can save and retrieve the whole array from local storage, and you can sort the array...
I made a quick sample to show you how it works.
sorting the array gets a little tricky, because you can only sort the first element on a axis, so we have to reserve the first element for sorting purposes (element 0), and store all the data in elements 1,2,3... and then copy the column we want to sort by into element 0 before we can do the sort. To get the array in descending order (so high score is at the top) we reverse the array after sorting it... (when sorting by score. Name and car are sorted ascending in my example).