True, for me it's not clear if I finish the tasks properly because Im not sure if I get it crossed out on my paper.
I'm not sure if it's a good idea that it's shorter and shorter, because then the more you play, the shorter the time it has, and although it becomes more challenging, maybe it won't feel rewarding for the player? I think the time can be generally more (thinking of the game Berlin apartment) just you will receive new tasks when you finish the old list as a new level?
But anyways adding a clock or a timer to the UI would be nice, because now it's confusing when the time will end.