First off I really like your page, very original style just like your example sites.
Coming from the perspective of the corporate world I do agree that the loading sequence, although very nice, is quite distracting. The color changing bar at the top would lead users (i.e. potential employers) to believe that your page is slow or partially broken.
Clicking on the portfolio section should have a mechanism to return to your main site. This will keep your "Main" site as the focal location and it would make navigation much easier.
Also I found myself a bit confused when entering your page and first choosing "Portfolio" or "About". In either case scenario I found that when selecting one option I would only see that section (i.e. initially clicking portfolio would display just portfolio). But once I scrolled back up and clicked the other section then both were displayed. I'm sure this is on purpose and I'm just prob nick picking so, I'm truly sorry. But it makes it seem a bit "wonky". Like I said it's prob just me.
I did try it on Microsoft edge and the styling breaks down
MS edge sample 1
MS edge sample 2
Overall I do Love your pages, again very unique styles. And way better than mine, I assure you.