I think if you intend to get some interest you need to improve the demo:
The hotspot for the door is very difficult to find
sound when you open the drawer sounds like its something that should be from the TV
Comments when you remove/look at items
Walk grid isn't very good
When trying to talk to the big guy the dialog message was "thanks" click on that the game seemed to lock up and couldn't do anything
Can you use different cursors, or could you change the cursor with onenter/onleave events?
A step by step tutorial would be good, written rather than video

the XNA binding could be an issue unless you do some sort of framework installer when you realease a game, or some sort of check to indicate something is missing rather than just the crash
Its looking good though, it just needs some polishing