For geeks only...
edit ~/Library/Eigenlabs/1.0.1/log/pico 1.0.log and search for "temperature".
I note with some concern the fairly large logs that are being generated here, averaging about 2 or 3 megs a session, or 1 to 10 gigs a year if you played almost every day (apparently I've played at least once a day since I got it! :-D)