Hard Rejected of my first designed project :( - please guide me what should I do for my next project.

Please guide me what points should I keep in mind for my next project.

I really feel sad after receiving hard rejection on my designed and well organized project by videohieve team, here you guys can check preview.

User friendly organized folders, can check below:

They sends me this comments below, please guide me whats I made wrong it.

"Thank you for taking the time to submit your item. Unfortunately this item does not meet our quality requirements and cannot be accepted at this time.

The item does not meet our minimum design, animation, and technical requirements. We strive to accept professional quality projects, and unfortunately this submission doesn’t quite meet that criteria.

When reviewing projects, in addition to overall quality of design and execution, we take into consideration the flexibility, usefulness, appeal to a broader audience and broadcast readiness of the file. Unfortunately we don’t feel as though this project meets the standards we have set for these criteria.

We look forward to seeing more of your work."