Bro Many Users have done many changes and update like Whatsapp orders, Admin can place order etc.. which you can see and have already seen...
Then why don't you take their help if they are willing to share the source code and which you can implement and release it for the whole community?
I am completely satisfied with your product but the necessary updates is also required. it will be beneficial for you too as many competitor are also coming your product will always be ranking with Good sales and Features.
Just a suggestion, rest its your call.