Hard Reject . Any improve suggestions?

Hello friends . Sometimes every of us have this f***ng hard reject moment .
This time it happend with me. It is not my best work for sure, but any ideas why is it rejected and suggestions how to change it to better for approve?
tnx guys !

Video : https://youtu.be/INA6UAoLeZE

The reveal is almost a simple fade. This does not look realistic enough, especially cause I think the background looks quite nice. Work on that reveal, invest a lot more time in particle animation, then this might get approved. Right now it is far away from the standards here, Iā€™m afraid.