For anyone interested, this is still being worked on, albeit slowly. I did get quite a long way towards making a first playable build over the summer, and I've received some help in livening up the backgrounds, but I was distracted by 'life' and the Ludum Dare (my entry is here, incidentally: http://www.ludumdare.com/compo/ludum-dare-27/?action=preview&uid=21166
I've scaled the game down a little and reduced the number of locations to seven. If that sounds pointlessly few, it's perhaps time to reveal that the game will have a kind of Groundhog Day mechanic which means there will still be a lot of variety. I was withholding that information as if it were some sort of valuable trade secret but now that the '10 Seconds' Ludum Dare has spawned about a thousand games with a similar premise, I guess there's no harm in revealing it.
Hopefully I'll have more news soon but I don't want to show anything before it's as polished as I can make it.