Why was my Project rejected?
I guess the problem is that you focused on a huge and oversaturated category like slideshows and specially wedding slides, and your project doesn’t have anything unique to outstand among all those works already approved. There are tons of these projects and I think your work is outdated about design and motion. Besides, you didn’t use any text, at least to introduce or finish the slideshow.
Try to watch other slideshows and you’ll see what I mean.
Thank you for your answer.
I will try to make it more perfect