I certainly was confused and had a hard time starting it. If a significant amount of people can't even figure out how to start the game, the problem isn't inconsequential.
I agree with you, but this is distracting from the merits of the demo. Also, this is currently #2 on the front page so clearly many people are able to navigate the demo UI, even if it is suboptimal.
I decided to leave only a secondary comment at the bottom of the thread for the same reason as yours and still got 14 ups (i.e. thanks) in a short time before this branch bubbled up. People definitely get confused and that's worth talking about before the merits of the demo, cause you have to run it somehow. I almost left too thinking it's broken, hugged or something. It is distracting and we'll live through it :)
I certainly was confused and had a hard time starting it. If a significant amount of people can't even figure out how to start the game, the problem isn't inconsequential.