Your projects are not there yet to get suggestions to improve the design, there’s almost no design at the projects. You will get rejection if you submit those.
On top, it seems you may have coded for these projects for other companies. It’s not ethical and you may not have the “rights” to share the source code and sell those elsewhere.
May I know you refer to the three links I have?. Those are my projects and yes designed them for some companies and I want to improve the design to worth selling even if am not selling them.
You cannot improve those design/coding as those do not belong to you anymore. When you got paid for the project, you have transferred the ownership of the projects to buyer.
Actually can, Because i manage the websites for my client and it comes with free update from me once in a year. So I’m not updating for selling purpose, but to update my client website.
In the future, make sure you build project exclusively for selling. I already did things that you do and I got hard rejected, the reviewer are very experienced and they can know every item they reviewed.