You can find two assets bundles as part of this open source project for in-app purchasing The SOOMLA Project. There are two open source apps that we shared as an example. Here is a link to the assets: https://github.com/soomla/storefront/tree/master/themes/muffinRush/img https://github.com/soomla/storefront/tree/master/themes/basic/img

You can also download the entire library as a zip file here - https://github.com/soomla/storefront. We are planning to add a lot more theme in the next few weeks and in about a month you will be able to use our wizard to generate a fully functional in-game store-front with all the assets and screens.