It's coming together! I ended up using Blender a lot more than I had expected this time; just about every screen has a CGI environment in the background.

...Did anyone else get the urge to go dust off that copy of Myst just now?

Anyway, for the most part, there's just a bit of topping and tailing to go - a title screen, some intro text, and a bit of tweaking the underlying systems - but with the exception of the temple, the game is mostly silent right now. And given the need for some sound effects for the sacrifice, I wonder if my supermarket has any watermelons in stock...