i got like a total of 5 hours of sleep and i got the same results too. on the 3rd puzzle, i thought i had look at all the drawings in the picture, with a few seconds left before the time ran out, i realized i haven't look at the bushes on the right side of the picture if i remember correctly. so it was too late as time is up. the 4th puzzle is probably the hardest of them all to me though. i only found 2 on that one. anyway, combined with yesterday where i got about 4 to 5 hours of sleep, i am like 8 hours short of sleep total. so, its not bad that i got 13 out of 15 score today.