Thanks for the reply.
Tags, I don't know, probably just a bunch related to the content of the game, like "imps", "expansion" and "weight gain" and such. Maybe "management"? The game kinda fits a lot of molds.
Also, no, the game freezing, nothing seemed to work, I couldn't click out of it or anything. Clicked all over the screen, all the buttons, the imp itself, nothing.
The problem with bug hunting there is that I don't think I was doing anything out of the ordinary, so I think bughunting for that could stay on the back-burner to wait and see if anyone else has the same lockup, preferably in some way that makes it easier to repeat.
EDIT: the game just froze up again, this time after a successful imp run. Clicked everywhere, no response.