It's charming, even if the story is a bit weak. I'm well towards the end point now, after six hours, chasing Napoleon through Paris after a daring hang-glider rescue off the Eiffel Tower. Some of the rhythm games are pretty difficult, and I'm currently stuck on a second Samba-de-Amigo-inspired side level which was reached by talking to a dancing Mexican. I think the buttons just aren't responsive enough.
The other amusing thing is that the on-screen text doesn't always match up to the spoken words. Challenged by Napoleon on the tower, he gave an evil laugh. On the screen, he said "Ooh hoo hoo!". Charlie, the detective's son, has a comedy cockney accent; the text read "roam free", he said "runnin' rampant". Of course, this may be the case with other handheld games but I very rarely play them with sound on. This demands that I do - and the soundtrack is great.