Citazione fergusferret:

a game for the ambidextrous with no way for some of us to play.

Actually, you don't reallx need ambidexterity to solve any puzzle. You don't have to move both characters simultaneously. Only thing is, you probably won't beat the time challenges then. But what the heck?
I like the Fireboy & Watergirl series as a challenging physics and skill puzzler that makes one think. Still, the ambidexterity aspect is pretty pointless, and I would wish for a deeper backstory and some kind of ending after all levels are solved.
Still 4/5 from me. Maybe a bit too much, but I've got the feeling that it will buff out.