The Figure was pretty hit and miss for me. There were a lot of neat challenges in it, but overall I feel like only having one save point before each "set" makes it kind of mind-numbing.
Challenges that stick out in my mind as really bad for that are (and forgive me for not remembering the names) the red-walled one where you have to aim and control yourself perfectly and use a bunch of the flower power ups in succession, which took me probably an hour just on that challenge because I'd die from being a tiny bit off and have to reset, and then as soon as I got it down and made progress I'd not know what to do because new territory, then die, then repeat messing up the first two screens.
The other one that stuck out as kind of bad was the orange-walled one with all the robots. It was made with two really easy, but boring/time wasting rooms at the start, then one really hard room, and then I think it went on to bouncing off ramps, but that might have been a different challenge. Nonetheless, every time I died in that one hard room I had to redo those really boring rooms that just wasted my time over and over again.
I respect difficulty, I'm even working on a Knytt Stories level that might equal or surpass The Figure in difficulty, but I hate having to deal with endurance, and prefer to have a save spot after every challenge. It's no fun doing the same rooms over and over again because you didn't finish a room that comes AFTER them.