Ah, perfect - of course I posted this comment on the demo page, and didn't even think of this!
I seriously can't put this game down, btw - I've tried a lot of games on PD, and this might just be the best one yet. The mechanics, presentation, and the treasure trove of statistics on the 'history' page... I think I'm in love!
Are you planning any more games for PD? Whatever you come up with, it'll be an insta-buy for me :D