How to add shop functionality to purchase characters and different skins to play it

Hi Dears,
I am creating an endless runner game where you can select the character your playing with similar to Subway Surfer.
I want to add a shop in order to purchase the characters from the coins you collect during your run, as well as purchase different skins related to the character. I have a character selection widget that has the skins and everything working i just want to add the character and skin purchase functionality to it.
Thanks your time,
Anthony Ibrahim

1 Like