I'm super keen to see what you decide to do! Still though -- it's a good little puzzle game as it is already. Just needs a little sound... and perhaps a reset button when I realise I made a mistake and have to refresh the page.
(Off topic now, but I believe I tracked down a precursor to the Navidson Record... if you have the time, I recommend checking out the graphic novel adaptation of Paul Auster's novella 'City of Glass'.)