I played around with this a bit this morning and couldn't find a satisfactory way to map a key to call up the menu once the game has started by using the config file. I suspect it's hard-coded to "Esc" and will take a simple source code edit to fix. It's definitely playable. Just make sure you map a key to "Save Game" in the settings menu before you start, or you'll have to lose your session when you quit.

I summarized the known issues in the previous post. If you don't see anything there that you can't handle and are willing to take the risk of using devel-quality apps, feel free to install it and give it a go.