Wow. It's obvious you put a ton of effort into this. The art is fantastic, and the sound design is great too. The fact that you used both the web browser version and downloadable version only the web browser version to tell a story is really creative and clever.
Nana's dialogue confused me for a bit as to what the first password was. I thought it was implying the password was coming up after her dialogue. It was pretty obvious what it actually was in hindsight, though.
The good ending got an audible "Aww..." out of me. Shame about the last level being bugged; would have been nice to experience the whole thing.