If you want to start using Drupal and use it like an arcade games site, you need to learn basic things about HTML,PHP and MySQL :D
It's very easy to learn these languages -_^
I do my sites by coding it from scratch,i use PHP,MySQL and CSS...that's enough for what i need...now im just learning about Construct2 and after im gonna make games and combine with my sites, that's really nice for me,im a non-professional "webmaster" who likes to do his own things ^_^
For you the "easy" part it's making your games with C2, but the "hard" one it's to make the site to integrate your community xD!
so You need to learn what we recommended to you, and i need to learn about Construc,im new with it !