Ryan says that the game is a joke based on how he feels about modern day FPS games, and how their campaigns have devolved into mush. I don't want to spoil anything for you, but it's only 15 minutes long, and definitely worth playing.
Interestingly enough, due to constraints, co-op and controller support had to be cut -- this joke was pretty well thought out! You can download the game at the landing page here, or play it directly in your browser.
Bungie adds support for moving Destiny items between characters online and in-app
8:00 AM on 02.27.2015