First off - great game and awesome idea :)
i played through the demo multiple times (less and less bugs every time :) )
one of the runs i was stuck. i placed the guest room from the tutorial on first floor a few tiles away from the rest of the floor. i assumed the game would put a generic corridor to connect the room, but... it just wouldn't get build because of no access. since it was in the tutorial bit i couldn't delete/move the failed room and i couldn't build more then 2 rooms at a time (both inaccessible due to me being a derp :P).
there was no way to proceed.
in the release game some sort of corridor or early way to move rooms and cancel builds would be good :)

Keep up the good work guys :D