The rules allow for editing of the description, but linking off to updated builds, effectively bypassing the submission deadline might not be totally above board. Might want to get some clarification from the organizers about that.
I'd like to check this out. It looks super cute. But I'm on a mac. I don't mind building from source (actually this would be preferred, I'm not really about running a bunch of random executable files) but it looks I'm out of luck there.