From my limited time with it in earlier dev, it embraces a number of Roguelike tropes that are generally very much not the order of the day for MMO's and perhaps best fits under my oft stated "Eh, close enough---the inspirations were clear". If Triangle Wizard went online, and became much moreso bullethell'ish---I'd still consider that close enough as well to give a terrible example.
Yep, pretty sure it is that Oryx, TIG Source has a page up on it today as well lauding how far this little compo game has climbed since the original tileset was release alongside the early alpha.