I propose to choose the duration of the game

I propose to make the game the ability to choose the duration of the game, 30 seconds, 60 seconds, 90 seconds. Some people think faster, some slow-witted and do not have time to plan actions. Let those who think faster play 30 seconds with the same as them, I personally do not have enough and 60 seconds, at least in duels I would play 90 seconds, otherwise, I lose because I do not have time to think.