Thanks for this detailled review !
Can you please tell me some other platformers that follow this idea ?
As far as I know, 10 seconds challenges is pretty common (You Have 10 Seconds serie, 10 Seconds Ninja are the most famous ones), other games have those kind of limitation (Super Meat Boy with A+ grades for example), but I don't remember of any game that limit your total playtime, I mean by that the whole game (not individual levels) to one minute.
Thanks a lot ^^