What is wrong in my project? Why is it rejected?

Hello Ollomy. I think you should improve your work. I highly recommend you to add some new animation, change Main sentences font (It is not suitable font to education theme) and also colors needs changes. They are not suitable. And last thing is you should animate brush composition and remove some of your elements. They are too much.
If you update your work like my recommendation, you will might get an approval.

Thanks for your interesting suggestions. I’ll probably do that