I admit this was my one complaint about their API when it was released, since it meant I couldn't do thinks like write Uber for Glass. Their branding document is very detailed and handy to make their buttons look good on mobiles too, so I liked the quality of their work otherwise. Since they fixed it I'll have to take a look at doing the hackathon, I guess. Although maybe I'll have to put it on a watch instead of a Glass since Glass is dead.