I noticed that some of these 2014 games (in particular the first one) are created in Flash, which to me suggests that there are still some purposes within rich web media it suits better than the plain web html5/css/js stack everyone is trying to kill it with. I really hope support for Flash isn't widely dropped before we can replicate its utility for richly interactive media in our new standards. (The web seems now just for websites and web applications rather than more rich games and animations.)
Thanks for pointing that out, I would have missed that important detail otherwise. The majority of his games are indeed in HTML5, so I do wonder what made him choose Flash as an export target for the one or two such games I've seen.
I don't know, a lot of the games here are simple enough they can be made in HTML5/canvas. In fact, their written in Haxe, and that can target HTML5 as an export (performance might be a bit touchy though)