I'm guessing it'll be tweaked to support a controller? And it's a big-name "Launch Title". Gives some cred.

They're saying "We got social proof from an A-lister"

An official partnership means they'll probably work together to make it go beyond "it works" to make it a great experience that brings out the best of Ouya platform, e.g. make use of hatever social features, game controller tweaks, settings are available to make it a proper showcase.

Same here, they are getting money for a game that has been released already and that many of us play every day... Sometimes I wonder if people think before funding a project on Kickstarter, it is getting ridiculous.