Item hard rejected but dont know why?

Hi everyone,

I am new author at codecanyon and uploaded my first project…or in other words I am new seller.

After uploaded my project I got an email from review then saying…

“Simple Contact less QR Digital menu system for restaurant & business owners” 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.

It took me months to build this…and after seeing Rejected word in email title I completely loose all hope…they didn’t see how much hardwork we did at the back of each project and in just 33min they rejected it completely:( wasted 1.5months…without giving specific reason…

I would be very appreciated if someone point out what is the reason behind this…what was the quality standards that I didnt make it up…

Q. can I resubmit this project again? after make changes in it?

Demo link: https://dev.denieuwehoreca.nl/

Admin demo link: https://dev.denieuwehoreca.nl/admin
username: admin@admin.com
password: admin123

I think No one is expert here…