Hello!
Just recently we have noticed that Steam has delayed The Steam Game Festival Summer Edition to June 16th, 10 AM PDT. We are part of this event so the demo itself won't be available until the Festival starts.
I hope you can keep up with us for another week while we wait for the event to begin! In the meantime, we have worked some updates for the demo so at least you will have more content to enjoy :)
The Spoonman Games Team.