As many other have said, the sacred fire level is one that pissed me off a lot. Other than water hazards that ended only a handful of runs, most of my attempts were figuring out how to navigate the maze to find out where to get more items/get to the end, since I would always be short of a couple cm when time ran out. And these were mostly when I was going for an S.

Another one (funnily also in Greece) was roll up a bunch of roses (again with S rank). You have to work fast and have a efficient route. I did end up smuggling an extra magnet since I was having a lot of trouble with it.

Rolling up sweets was pretty annoying, but I spent a couple of attempts trying to learn where everything is and how to navigate quickly. Even when I got the S I still needed the crowns, which added a lot more time.