The parallax on the background looks nice and subtle, the interactions are relaxed enough, I like it. You may want to modify the layout a bit here and there though.
I’d get rid of transparent blocks - making them white feels better for browsing and focusing on content.
Do not increase the first block on the main page on hover - rather increase it’s content so that the block stays the same size.
The “latest work” block looks way better than the actual portfolio blocks because of a more cohesive layout of elements.
I’d make “about us” page a bit livelier - it is an important part of the site after all!
Another important thing - it is obvious that you have designed on a larger monitor with large resolution. Try setting your site inspector to show you the smaller laptop resolutions (like 1280x600 or something like that) and you will have your hands full with fixes for a while
I’d gladly see update on this one!
Keep it up, mate!