Google play - sell new levels

[san_san]

Hi,
In my game:
https://play.google.com/store/apps/details?id=pany.AAAStarCreator.Kuhni
i want to sell new levels.

1. I need to setup server, where files for this new levels will be located.
2. Or i can download this files on google play?

Probably there is some asset in Store, which support Playmaker to make it easier?