the 1 week,is the time from the start to the end or just the time from the levels

can someone tell me why he sometimes does not die its on 4:42 it does not happen much to me its like 2times in 30runs,do i explode the bombs to fast-to slow i dont get it,and yes i could of just killed him but i panicked

there is a timer on the end,it would be nice to have it on here to speedrun,there is a guy that did 6min and something,i almost got under 10,my pb is 10min44sec (edit:i did 9min40sec now) (edit again: 8min59sec and i even f. up on the fight with marg.)