How do I setup in game store

Hi

I am creating a mobile and pc game which has multiple levels, but know I have placed a few in my game but I would like the consumer to go into the game to purchase new levels. How would I go about doing this. I have already setup a Google play merchant account if that helps.

Well you should searched in the forums & tutorials before you post this. this is a tutorial from scirrra https://www.scirra.com/tutorials/245/how-to-series-in-game-shop if it didn't help, search in the tutorial section, you will find some info there.