No Brakes Valet was the Ouya's killer app and is just as tremendous off of it.

oh, that's super awesome! I'm glad it gave you a moment of amusement, that's all I was gunning for here really :)

I'm playing in Safari on MacOS, which does not have .ogg support and thus tries to get .m4a files for the music; I'm assuming this is something the engine automatically does for cross-browser support?

I hadn't actually noticed there was meant to be music until until I reached the full choir, so I checked the in-browser Developer Tools and there are messages appearing in the browser console saying the .m4a files yield a 404:

https://v6p9d9t4.ssl.hwcdn.net/html/287757/media/k...
https://v6p9d9t4.ssl.hwcdn.net/html/287757/media/f...

(etc)

Excellent little thing, I enjoyed this a lot! The music files currently 404 though :(