I uploaded a POS software and it rejected. Please help me to find a solution.

I uploaded a POS software in Code Canyon and it rejected. Please help me to find the solution it will help me further.

Here is the link of the product- Point of Sale (POS)

Here is the message that I got from the Envato Quality team:

**"**Thank you for your submission. We have completed our review of “POSVentory- Point of Sale, Stock, Purchase, Invoice, Tax Management | Web & Mobile App (SaaS Ready)” and unfortunately we found it isn’t at the quality standard required to move forward, and you won’t be able to re-submit this item again.

We appreciate the effort and time you’ve put into creating your item. And we’d be happy to help make sure your next entry will meet our submission requirements. Here’s our advice:

Visit our forums and ask fellow authors for feedback. Our helpful community will be glad to lend a hand.

Check out this Help Center article to understand why and how items get rejected.

Remember you can get help in the form of tutorials on Envato Tuts+.
We hope to see a new submission from you soon!

All the best!
Envato Quality team
Still have questions? Contact our Help Center."

i dont know much about the coding stuff but the design itself looks too basic