The only thing i would say is that the 5sec is a bit long, or it felt that way, i think adding 1 sec to the end of the time when you put the box away, to keep up the pace would make it tougher, but still for three hours great job!
I do agree, my one main regret is that it is way too easy! Let it shall be an example for all on the importance of having time for playtesting. Thank you!