One of the best reasons to use WordPress is the variety of themes available. When building a gaming site, there is no shortage of awesome WordPress themes to pick from. I'm going to recommend three themes in particular for your site.
I read the comments, according to those comments we can't but i thought we can develop games with WordPress because with HTML5 it's possible. You mean there is not templates there to develop games? Because i don't know much about WordPress. But it's open source after all, we can develop our templates, can't we??
Wordpress is content management system, not framework.so you can't build game.. Its only manage your game as content in web. Are you want embed html5 game in wordpress ?
if you mean make game without coding skill, than your option only use game maker. its best for design student & public people
try online game maker such as construct 3.