Just found this game recently thanks to Rogue Basin; absolutely loving it. I haven't played a rogue like this much since DCSS.
There are two things that i find myself constantly wanting: a way to quickly scroll through my captured demons without backing out of their menu (so i could easily compare their stats, for example), and (this may already exist, but I haven't been able to find out how to access it) a way to display all of the recent messages, rather than just the last 10 or so; turns happen fast and it is not always obvious what happens when.
Other than that, keep up the good work!!
-WJC