Let's be honest. Your movie could have Tom Cruise, Greta Garbo, Robert DeNiro and many other "stars" in it. It could be a collaborative piece co-directed by Martin Scorsese, Howard Hawks, Jean-Luc Godard. Sven Nykist could be doing the camera work. You could bill it as Robert DeNiro having real on screen sex with Greta Garbo and on and on and on. However, if it doesn't have a script or has just a minimal outline, then it will never be what it could be. Shows like Reno 911 are the exception to the rule. They are both no means the norm.
"Hannah Takes The Stairs" suffers from having no script. It is its glaring weakness and what, in the end, makes it wholly unsatisfying. As a whole, the story wanders around way too much and does not give its viewer a reason to really care for any of its characters. It is the kind of film you watch once and then forget about totally. If you were to ask me, should I see "Hannah Takes The Stairs", I would say, "Definitely. Watch it once but you won't ever want to watch it again."