Wow, this was a great challenge. It took me longer than I expected (around 6-7hrs), but, in the end, I was able to complete every section, both for mobile and desktop versions. I think the decision to go mobile first or desktop first influences a lot your approach and the solutions you need to find for every little detail. It is also important to point out that the way the site looks will depend greatly in the type of device you have. It definitely needs more media queries, so it looks great in all screen sizes, but I think the point of this one was to see how much one was capable of doing.
One question --> In the "Creations section", I wanted the hover effect to have a transition, but I was not able to achieve it. Any help would be appreciated.
Any other feedback is also welcome.