The site's organization scheme has poor discoverability. Having the categories buried inside of a list element, instead of hierarchically closer to the root, is unusual and confusing. (Yes, many blog posts have tags at the end, but many blogging platforms also have major categories/tags in a sidebar.)

Having the some of the most useful tags (platformer, puzzle, rhythm, etc.) highly visible before the listing would go a long way towards improving usability of the site.

All of that said, I am a big fan of the site's concept.