Please update to latest version. We fixed hover issues on mobile. Also almost your question can found on forum.
If you want to customize something please follow topic tutorial customize use child theme.
You can hide or change any information you want.
About popup when you responsive that’s issues of external library prettyPhoto. So we’ll update when this repository update.
About image color. Maybe have issues with your item or server. We’ve checked on our site and iOS 11, Iphone 6s and all working fine.