Sadly I'm not smart enough to save my hot cow gf. I liked the juice you added which made it really engaging (the sounds, the text effects). I think it would be interesting if there was more questions than population of things.
Also while it was obvious I think a basic "calibration" question could have helped as well - e.g. "how many sides does a triangle have" and have it slowly count down from 10. Then you just throw that result away and bam - they know how the game works and they don't waste time getting a question wrong trying to understand the interface.