Thank you both!
@NewInBoston In the works pages, I'll probably add a button to the next work and maybe to go back. There are some things that I haven't done yet. Also in the about page there will be other 3 sections and some more animations.
Regarding the loading time: the loading pages are fake. At the beginning, I've set it to disappear when all the elements were loaded, but in some pages, like gallery, it was really too slow. So I've set the loading page to disappear after 2 seconds for the galleries and 1 second for all the other pages. I tried to avoid, as much as I can, the elements pop-up effect.
@geletelx You have to give an interaction at the image (in this case, a father link block containing the image and all the texts). In the interaction settings add an Hover Trigger and in it you must turn on "affect different element(s)" and select the element that you want to animate. Now you can set the interaction as you wish. So, when you'll hover the element with the interaction (for example, the image), the selected element (for example, the text) will be animated.