I have a Nook Tablet running 1.4.1. I noticed the other day when I played the crossword game that comes preinstalled that after I win a game that it won't stop the animation so I can start a new game. It won't actually even let me play a new crossword game without rebooting the nook. I never noticed this behavior on my regular nook color but I haven't played the crossword on it since the update.
So if you tap on Game (in the lower left hand corner) a new game does not appear.
Most times if I have an issue with an app, I archive it then unarchive it and things seem to work as intended. BUT with preloaded apps, you do not have the archive option.
I hate to say it, but either call CS or stop by one of your stores. Sorry I couldn't offer more assistance.