After Effects Animated Icons Rejected - Feedback Pls

My After Effects file of animated icons was rejected for quality requirements which could mean design, technical, or animation and cannot re-submit this product. Can anyone provide some feedback as to why? Is it the designs? Should they be in color? Is this topic uninteresting? Or are there too many projects like this? I’m lost.
Thanks!

Hmm. Yeah not upto mark. I don’t like the icon designs also. It may be hard to hear Just look at the approved Icons